625614990 has 256 divisors, whose sum is σ = 2048385024. Its totient is φ = 118080000.

The previous prime is 625614959. The next prime is 625615007. The reversal of 625614990 is 99416526.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2492365 + ... + 2492615.

It is an arithmetic number, because the mean of its divisors is an integer number (8001504).

Almost surely, 2^625614990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 625614990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1024192512).

625614990 is an abundant number, since it is smaller than the sum of its proper divisors (1422770034).

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

625614990 is a wasteful number, since it uses less digits than its factorization.

625614990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 625614990 is about 25012.2967757861. The cubic root of 625614990 is about 855.2683129039.

The spelling of 625614990 in words is "six hundred twenty-five million, six hundred fourteen thousand, nine hundred ninety".