628875090 has 40 divisors (see below), whose sum is σ = 1690977420. Its totient is φ = 167699808.

The previous prime is 628875089. The next prime is 628875109. The reversal of 628875090 is 90578826.

628875090 is a `hidden beast` number, since 62 + 8 + 87 + 509 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 626450841 + 2424249 = 25029^2 + 1557^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 387385 + ... + 389004.

Almost surely, 2^628875090 is an apocalyptic number.

628875090 is an abundant number, since it is smaller than the sum of its proper divisors (1062102330).

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

628875090 is a wasteful number, since it uses less digits than its factorization.

628875090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776408 (or 776399 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 628875090 is about 25077.3820403965. The cubic root of 628875090 is about 856.7513501318.

The spelling of 628875090 in words is "six hundred twenty-eight million, eight hundred seventy-five thousand, ninety".