39487816 has 8 divisors (see below), whose sum is σ = 74039670. Its totient is φ = 19743904.

The previous prime is 39487807. The next prime is 39487823. The reversal of 39487816 is 61878493.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20738916 + 18748900 = 4554^2 + 4330^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×39487816² = 3118575224899712, which contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2467981 + ... + 2467996.

Almost surely, 2^39487816 is an apocalyptic number.

It is an amenable number.

39487816 is a deficient number, since it is larger than the sum of its proper divisors (34551854).

39487816 is a wasteful number, since it uses less digits than its factorization.

39487816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4935983 (or 4935979 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 39487816 is about 6283.9331632346. The cubic root of 39487816 is about 340.5292104579.

The spelling of 39487816 in words is "thirty-nine million, four hundred eighty-seven thousand, eight hundred sixteen".