655378320 has 40 divisors (see below), whose sum is σ = 2031673536. Its totient is φ = 174767488.

The previous prime is 655378309. The next prime is 655378331. The reversal of 655378320 is 23873556.

It is an interprime number because it is at equal distance from previous prime (655378309) and next prime (655378331).

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1365132 + ... + 1365611.

Almost surely, 2^655378320 is an apocalyptic number.

655378320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

655378320 is an abundant number, since it is smaller than the sum of its proper divisors (1376295216).

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

655378320 is a wasteful number, since it uses less digits than its factorization.

655378320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730759 (or 2730753 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 655378320 is about 25600.3578099995. The cubic root of 655378320 is about 868.6217310062.

The spelling of 655378320 in words is "six hundred fifty-five million, three hundred seventy-eight thousand, three hundred twenty".