628484640 has 96 divisors (see below), whose sum is σ = 2262556800. Its totient is φ = 143652864.

The previous prime is 628484639. The next prime is 628484651. The reversal of 628484640 is 46484826.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 628484592 and 628484601.

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, 90165 + ... + 96884.

It is an arithmetic number, because the mean of its divisors is an integer number (23568300).

Almost surely, 2^628484640 is an apocalyptic number.

628484640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

628484640 is an abundant number, since it is smaller than the sum of its proper divisors (1634072160).

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

628484640 is a wasteful number, since it uses less digits than its factorization.

628484640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187074 (or 187066 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 42.

The square root of 628484640 is about 25069.5959281357. The cubic root of 628484640 is about 856.5740028733.

The spelling of 628484640 in words is "six hundred twenty-eight million, four hundred eighty-four thousand, six hundred forty".