655622730 has 48 divisors (see below), whose sum is σ = 1948137984. Its totient is φ = 149856480.

The previous prime is 655622729. The next prime is 655622741. The reversal of 655622730 is 37226556.

It is a happy number.

655622730 is a `hidden beast` number, since 65 + 562 + 2 + 7 + 30 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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, 519706 + ... + 520965.

It is an arithmetic number, because the mean of its divisors is an integer number (40586208).

Almost surely, 2^655622730 is an apocalyptic number.

655622730 is an abundant number, since it is smaller than the sum of its proper divisors (1292515254).

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

655622730 is a wasteful number, since it uses less digits than its factorization.

655622730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040691 (or 1040688 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 655622730 is about 25605.1309311239. The cubic root of 655622730 is about 868.7296958490.

The spelling of 655622730 in words is "six hundred fifty-five million, six hundred twenty-two thousand, seven hundred thirty".