37428981 has 16 divisors (see below), whose sum is σ = 52254720. Its totient is φ = 23785520.

The previous prime is 37428973. The next prime is 37428991. The reversal of 37428981 is 18982473.

It is a cyclic number.

It is not a de Polignac number, because 37428981 - 2³ = 37428973 is a prime.

It is a super-2 number, since 2×37428981² = 2801857237396722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37428901) 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, 24016 + ... + 25526.

It is an arithmetic number, because the mean of its divisors is an integer number (3265920).

Almost surely, 2^37428981 is an apocalyptic number.

It is an amenable number.

37428981 is a deficient number, since it is larger than the sum of its proper divisors (14825739).

37428981 is a wasteful number, since it uses less digits than its factorization.

37428981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896.

The product of its digits is 96768, while the sum is 42.

The square root of 37428981 is about 6117.9229318454. The cubic root of 37428981 is about 334.5050416949.

The spelling of 37428981 in words is "thirty-seven million, four hundred twenty-eight thousand, nine hundred eighty-one".