64440416 has 24 divisors (see below), whose sum is σ = 127801800. Its totient is φ = 31982848.

The previous prime is 64440403. The next prime is 64440427. The reversal of 64440416 is 61404446.

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, 2966 + ... + 11733.

It is an arithmetic number, because the mean of its divisors is an integer number (5325075).

Almost surely, 2^64440416 is an apocalyptic number.

It is an amenable number.

64440416 is a deficient number, since it is larger than the sum of its proper divisors (63361384).

64440416 is a wasteful number, since it uses less digits than its factorization.

64440416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14846 (or 14838 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 64440416 is about 8027.4788071972. The cubic root of 64440416 is about 400.9154366743.

The spelling of 64440416 in words is "sixty-four million, four hundred forty thousand, four hundred sixteen".