2628381 has 16 divisors (see below), whose sum is σ = 4091904. Its totient is φ = 1469424.

The previous prime is 2628359. The next prime is 2628383. The reversal of 2628381 is 1838262.

It is not a de Polignac number, because 2628381 - 2⁹ = 2627869 is a prime.

It is a super-2 number, since 2×2628381² = 13816773362322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2628383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345 + ... + 2318.

It is an arithmetic number, because the mean of its divisors is an integer number (255744).

2^2628381 is an apocalyptic number.

2628381 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2628381 is a deficient number, since it is larger than the sum of its proper divisors (1463523).

2628381 is a wasteful number, since it uses less digits than its factorization.

2628381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720.

The product of its digits is 4608, while the sum is 30.

The square root of 2628381 is about 1621.2282380960. The cubic root of 2628381 is about 138.0054083157.

The spelling of 2628381 in words is "two million, six hundred twenty-eight thousand, three hundred eighty-one".