37985981 has 8 divisors (see below), whose sum is σ = 42119328. Its totient is φ = 33966000.

The previous prime is 37985971. The next prime is 37985989. The reversal of 37985981 is 18958973.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 37985981 - 2¹⁰ = 37984957 is a prime.

It is a super-2 number, since 2×37985981² = 2885869505064722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37985989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27635 + ... + 28976.

It is an arithmetic number, because the mean of its divisors is an integer number (5264916).

Almost surely, 2^37985981 is an apocalyptic number.

It is an amenable number.

37985981 is a deficient number, since it is larger than the sum of its proper divisors (4133347).

37985981 is a wasteful number, since it uses less digits than its factorization.

37985981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56683.

The product of its digits is 544320, while the sum is 50.

The square root of 37985981 is about 6163.2768070240. The cubic root of 37985981 is about 336.1561921445.

It can be divided in two parts, 3798 and 5981, that added together give a palindrome (9779).

The spelling of 37985981 in words is "thirty-seven million, nine hundred eighty-five thousand, nine hundred eighty-one".