628447360 has 32 divisors (see below), whose sum is σ = 1502383500. Its totient is φ = 251378688.

The previous prime is 628447357. The next prime is 628447361. The reversal of 628447360 is 63744826.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 581002816 + 47444544 = 24104^2 + 6888^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (628447361) 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, 490335 + ... + 491614.

Almost surely, 2^628447360 is an apocalyptic number.

It is an amenable number.

628447360 is an abundant number, since it is smaller than the sum of its proper divisors (873936140).

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

628447360 is an equidigital number, since it uses as much as digits as its factorization.

628447360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981968 (or 981956 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 628447360 is about 25068.8523869762. The cubic root of 628447360 is about 856.5570659914.

The spelling of 628447360 in words is "six hundred twenty-eight million, four hundred forty-seven thousand, three hundred sixty".