625621830 has 16 divisors (see below), whose sum is σ = 1501492464. Its totient is φ = 166832480.

The previous prime is 625621823. The next prime is 625621847. The reversal of 625621830 is 38126526.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 625621791 and 625621800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10427001 + ... + 10427060.

It is an arithmetic number, because the mean of its divisors is an integer number (93843279).

Almost surely, 2^625621830 is an apocalyptic number.

625621830 is an abundant number, since it is smaller than the sum of its proper divisors (875870634).

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

625621830 is a wasteful number, since it uses less digits than its factorization.

625621830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20854071.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 625621830 is about 25012.4335081575. The cubic root of 625621830 is about 855.2714298443.

The spelling of 625621830 in words is "six hundred twenty-five million, six hundred twenty-one thousand, eight hundred thirty".