628717590 has 48 divisors (see below), whose sum is σ = 1669457088. Its totient is φ = 164089728.

The previous prime is 628717589. The next prime is 628717693. The reversal of 628717590 is 95717826.

628717590 is a `hidden beast` number, since 628 + 7 + 17 + 5 + 9 + 0 = 666.

628717590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 70087 + ... + 78546.

It is an arithmetic number, because the mean of its divisors is an integer number (34780356).

Almost surely, 2^628717590 is an apocalyptic number.

628717590 is an abundant number, since it is smaller than the sum of its proper divisors (1040739498).

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

628717590 is a wasteful number, since it uses less digits than its factorization.

628717590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148693 (or 148690 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 628717590 is about 25074.2415638041. The cubic root of 628717590 is about 856.6798205035.

The spelling of 628717590 in words is "six hundred twenty-eight million, seven hundred seventeen thousand, five hundred ninety".