39401964 has 72 divisors (see below), whose sum is σ = 118064128. Its totient is φ = 11255760.

The previous prime is 39401959. The next prime is 39401987. The reversal of 39401964 is 46910493.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3909 + ... + 9699.

Almost surely, 2^39401964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39401964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59032064).

39401964 is an abundant number, since it is smaller than the sum of its proper divisors (78662164).

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

39401964 is a wasteful number, since it uses less digits than its factorization.

39401964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5817 (or 5803 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 39401964 is about 6277.0983742490. The cubic root of 39401964 is about 340.2822454492.

The spelling of 39401964 in words is "thirty-nine million, four hundred one thousand, nine hundred sixty-four".