2986381 has 4 divisors (see below), whose sum is σ = 3067132. Its totient is φ = 2905632.

The previous prime is 2986367. The next prime is 2986387. The reversal of 2986381 is 1836892.

2986381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is the 706-th star number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1188100 + 1798281 = 1090^2 + 1341^2 .

It is a cyclic number.

It is not a de Polignac number, because 2986381 - 2⁵ = 2986349 is a prime.

It is a super-2 number, since 2×2986381² = 17836942954322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 80713 = 2986381 / (2 + 9 + 8 + 6 + 3 + 8 + 1).

It is a Duffinian number.

2986381 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2986381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2986387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40320 + ... + 40393.

It is an arithmetic number, because the mean of its divisors is an integer number (766783).

2^2986381 is an apocalyptic number.

It is an amenable number.

2986381 is a deficient number, since it is larger than the sum of its proper divisors (80751).

2986381 is an equidigital number, since it uses as much as digits as its factorization.

2986381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80750.

The product of its digits is 20736, while the sum is 37.

The square root of 2986381 is about 1728.1148688672. The cubic root of 2986381 is about 144.0063815330.

The spelling of 2986381 in words is "two million, nine hundred eighty-six thousand, three hundred eighty-one".