39397816 has 8 divisors (see below), whose sum is σ = 73870920. Its totient is φ = 19698904.

The previous prime is 39397801. The next prime is 39397819. The reversal of 39397816 is 61879393.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39397819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2462356 + ... + 2462371.

It is an arithmetic number, because the mean of its divisors is an integer number (9233865).

Almost surely, 2^39397816 is an apocalyptic number.

It is an amenable number.

39397816 is a deficient number, since it is larger than the sum of its proper divisors (34473104).

39397816 is a wasteful number, since it uses less digits than its factorization.

39397816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4924733 (or 4924729 counting only the distinct ones).

The product of its digits is 244944, while the sum is 46.

The square root of 39397816 is about 6276.7679581135. The cubic root of 39397816 is about 340.2703040792.

The spelling of 39397816 in words is "thirty-nine million, three hundred ninety-seven thousand, eight hundred sixteen".