39990996 has 36 divisors (see below), whose sum is σ = 104834912. Its totient is φ = 13330008.

The previous prime is 39990983. The next prime is 39991009. The reversal of 39990996 is 69909993.

It is an interprime number because it is at equal distance from previous prime (39990983) and next prime (39991009).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×39990996² = 3198559522144032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19600 + ... + 21543.

Almost surely, 2^39990996 is an apocalyptic number.

39990996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

39990996 is an abundant number, since it is smaller than the sum of its proper divisors (64843916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39990996 is a wasteful number, since it uses less digits than its factorization.

39990996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41162 (or 41148 counting only the distinct ones).

The product of its (nonzero) digits is 1062882, while the sum is 54.

The square root of 39990996 is about 6323.8434515728. The cubic root of 39990996 is about 341.9695263706.

It can be divided in two parts, 3 and 9990996, that added together give a palindrome (9990999).

The spelling of 39990996 in words is "thirty-nine million, nine hundred ninety thousand, nine hundred ninety-six".