7800381 has 40 divisors (see below), whose sum is σ = 12545280. Its totient is φ = 4818528.

The previous prime is 7800371. The next prime is 7800383. The reversal of 7800381 is 1830087.

It is not a de Polignac number, because 7800381 - 2⁵ = 7800349 is a prime.

It is a super-2 number, since 2×7800381² = 121691887490322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

7800381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7800383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 98700 + ... + 98778.

It is an arithmetic number, because the mean of its divisors is an integer number (313632).

Almost surely, 2^7800381 is an apocalyptic number.

It is an amenable number.

7800381 is a deficient number, since it is larger than the sum of its proper divisors (4744899).

7800381 is a wasteful number, since it uses less digits than its factorization.

7800381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 7800381 is about 2792.9162178626. The cubic root of 7800381 is about 198.3224772597.

The spelling of 7800381 in words is "seven million, eight hundred thousand, three hundred eighty-one".