628215560 has 64 divisors (see below), whose sum is σ = 1685664000. Its totient is φ = 206021376.

The previous prime is 628215559. The next prime is 628215587. The reversal of 628215560 is 65512826.

It is a super-2 number, since 2×628215560² = 789309579652227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 628215560.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42335 + ... + 55214.

It is an arithmetic number, because the mean of its divisors is an integer number (26338500).

Almost surely, 2^628215560 is an apocalyptic number.

It is an amenable number.

628215560 is an abundant number, since it is smaller than the sum of its proper divisors (1057448440).

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

628215560 is a wasteful number, since it uses less digits than its factorization.

628215560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97590 (or 97586 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 628215560 is about 25064.2286934986. The cubic root of 628215560 is about 856.4517406256.

The spelling of 628215560 in words is "six hundred twenty-eight million, two hundred fifteen thousand, five hundred sixty".