64409432 has 16 divisors (see below), whose sum is σ = 120884400. Its totient is φ = 32173600.

The previous prime is 64409381. The next prime is 64409459. The reversal of 64409432 is 23490446.

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, 6557 + ... + 13107.

It is an arithmetic number, because the mean of its divisors is an integer number (7555275).

Almost surely, 2^64409432 is an apocalyptic number.

It is an amenable number.

64409432 is a deficient number, since it is larger than the sum of its proper divisors (56474968).

64409432 is a wasteful number, since it uses less digits than its factorization.

64409432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7786 (or 7782 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 64409432 is about 8025.5487039828. The cubic root of 64409432 is about 400.8511708192.

Adding to 64409432 its reverse (23490446), we get a palindrome (87899878).

The spelling of 64409432 in words is "sixty-four million, four hundred nine thousand, four hundred thirty-two".