37944981 has 12 divisors (see below), whose sum is σ = 55628352. Its totient is φ = 24918696.

The previous prime is 37944953. The next prime is 37945007. The reversal of 37944981 is 18944973.

It is not a de Polignac number, because 37944981 - 2⁹ = 37944469 is a prime.

It is a super-2 number, since 2×37944981² = 2879643166180722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37944911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30861 + ... + 32066.

It is an arithmetic number, because the mean of its divisors is an integer number (4635696).

Almost surely, 2^37944981 is an apocalyptic number.

It is an amenable number.

37944981 is a deficient number, since it is larger than the sum of its proper divisors (17683371).

37944981 is a wasteful number, since it uses less digits than its factorization.

37944981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63000 (or 62997 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 37944981 is about 6159.9497562886. The cubic root of 37944981 is about 336.0352057073.

The spelling of 37944981 in words is "thirty-seven million, nine hundred forty-four thousand, nine hundred eighty-one".