39162981 has 48 divisors (see below), whose sum is σ = 63576128. Its totient is φ = 21288960.

The previous prime is 39162953. The next prime is 39162989. The reversal of 39162981 is 18926193.

It is not a de Polignac number, because 39162981 - 2⁷ = 39162853 is a prime.

It is a super-2 number, since 2×39162981² = 3067478161612722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39162989) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 202821 + ... + 203013.

Almost surely, 2^39162981 is an apocalyptic number.

It is an amenable number.

39162981 is a deficient number, since it is larger than the sum of its proper divisors (24413147).

39162981 is a wasteful number, since it uses less digits than its factorization.

39162981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 263 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 39162981 is about 6258.0333172651. The cubic root of 39162981 is about 339.5928835317.

The spelling of 39162981 in words is "thirty-nine million, one hundred sixty-two thousand, nine hundred eighty-one".