39899892 has 12 divisors (see below), whose sum is σ = 93099776. Its totient is φ = 13299960.

The previous prime is 39899813. The next prime is 39899903. The reversal of 39899892 is 29899893.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×39899892² = 3184002763223328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662484 + ... + 1662507.

Almost surely, 2^39899892 is an apocalyptic number.

It is an amenable number.

39899892 is an abundant number, since it is smaller than the sum of its proper divisors (53199884).

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

39899892 is a wasteful number, since it uses less digits than its factorization.

39899892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3324998 (or 3324996 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 57.

The square root of 39899892 is about 6316.6361300933. The cubic root of 39899892 is about 341.7096472071.

Subtracting from 39899892 its reverse (29899893), we obtain a palindrome (9999999).

The spelling of 39899892 in words is "thirty-nine million, eight hundred ninety-nine thousand, eight hundred ninety-two".