628431522 has 8 divisors (see below), whose sum is σ = 1256863056. Its totient is φ = 209477172.

The previous prime is 628431509. The next prime is 628431527. The reversal of 628431522 is 225134826.

It is a sphenic number, since it is the product of 3 distinct primes.

628431522 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (628431527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52369288 + ... + 52369299.

It is an arithmetic number, because the mean of its divisors is an integer number (157107882).

Almost surely, 2^628431522 is an apocalyptic number.

628431522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

628431522 is a wasteful number, since it uses less digits than its factorization.

628431522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104738592.

The product of its digits is 23040, while the sum is 33.

The square root of 628431522 is about 25068.5364949771. The cubic root of 628431522 is about 856.5498703398.

The spelling of 628431522 in words is "six hundred twenty-eight million, four hundred thirty-one thousand, five hundred twenty-two".