625909842 has 120 divisors (see below), whose sum is σ = 1544572260. Its totient is φ = 189181440.

The previous prime is 625909831. The next prime is 625909853. The reversal of 625909842 is 248909526.

It is an interprime number because it is at equal distance from previous prime (625909831) and next prime (625909853).

It can be written as a sum of positive squares in 6 ways, for example, as 443902761 + 182007081 = 21069^2 + 13491^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1357492 + ... + 1357952.

Almost surely, 2^625909842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 625909842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772286130).

625909842 is an abundant number, since it is smaller than the sum of its proper divisors (918662418).

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

625909842 is a wasteful number, since it uses less digits than its factorization.

625909842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 625909842 is about 25018.1902223162. The cubic root of 625909842 is about 855.4026542959.

The spelling of 625909842 in words is "six hundred twenty-five million, nine hundred nine thousand, eight hundred forty-two".