65904480 has 72 divisors (see below), whose sum is σ = 224903952. Its totient is φ = 17574144.

The previous prime is 65904467. The next prime is 65904497. The reversal of 65904480 is 8440956.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21444 + ... + 24323.

It is an arithmetic number, because the mean of its divisors is an integer number (3123666).

Almost surely, 2^65904480 is an apocalyptic number.

65904480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65904480 is an abundant number, since it is smaller than the sum of its proper divisors (158999472).

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

65904480 is a wasteful number, since it uses less digits than its factorization.

65904480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45788 (or 45777 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 65904480 is about 8118.1574264115. The cubic root of 65904480 is about 403.9289487179.

The spelling of 65904480 in words is "sixty-five million, nine hundred four thousand, four hundred eighty".