625990 has 16 divisors (see below), whose sum is σ = 1146960. Its totient is φ = 245920.

The previous prime is 625979. The next prime is 625997. The reversal of 625990 is 99526.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60 + ... + 1120.

It is an arithmetic number, because the mean of its divisors is an integer number (71685).

2⁶²⁵⁹⁹⁰ is an apocalyptic number.

625990 is a deficient number, since it is larger than the sum of its proper divisors (520970).

625990 is a wasteful number, since it uses less digits than its factorization.

625990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 625990 is about 791.1952982671. The cubic root of 625990 is about 85.5439168841.

The spelling of 625990 in words is "six hundred twenty-five thousand, nine hundred ninety".