628231760 has 40 divisors (see below), whose sum is σ = 1572998280. Its totient is φ = 231962112.

The previous prime is 628231757. The next prime is 628231819. The reversal of 628231760 is 67132826.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8620096 + 619611664 = 2936^2 + 24892^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 628231760.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300995 + ... + 303074.

It is an arithmetic number, because the mean of its divisors is an integer number (39324957).

Almost surely, 2^628231760 is an apocalyptic number.

It is an amenable number.

628231760 is an abundant number, since it is smaller than the sum of its proper divisors (944766520).

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

628231760 is a wasteful number, since it uses less digits than its factorization.

628231760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604095 (or 604089 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 628231760 is about 25064.5518611445. The cubic root of 628231760 is about 856.4591024293.

The spelling of 628231760 in words is "six hundred twenty-eight million, two hundred thirty-one thousand, seven hundred sixty".