625453998 has 32 divisors (see below), whose sum is σ = 1357437312. Its totient is φ = 190975200.

The previous prime is 625453979. The next prime is 625454003. The reversal of 625453998 is 899354526.

It is a super-2 number, since 2×625453998² = 782385407228368008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 625453998.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20388 + ... + 40823.

It is an arithmetic number, because the mean of its divisors is an integer number (42419916).

Almost surely, 2^625453998 is an apocalyptic number.

625453998 is an abundant number, since it is smaller than the sum of its proper divisors (731983314).

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

625453998 is a wasteful number, since it uses less digits than its factorization.

625453998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61360.

The product of its digits is 2332800, while the sum is 51.

The square root of 625453998 is about 25009.0783116851. The cubic root of 625453998 is about 855.1949434083.

The spelling of 625453998 in words is "six hundred twenty-five million, four hundred fifty-three thousand, nine hundred ninety-eight".