258861630 has 32 divisors (see below), whose sum is σ = 624871584. Its totient is φ = 68629376.

The previous prime is 258861623. The next prime is 258861661. The reversal of 258861630 is 36168852.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19749 + ... + 30128.

It is an arithmetic number, because the mean of its divisors is an integer number (19527237).

Almost surely, 2^258861630 is an apocalyptic number.

258861630 is an abundant number, since it is smaller than the sum of its proper divisors (366009954).

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

258861630 is a wasteful number, since it uses less digits than its factorization.

258861630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50060.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 258861630 is about 16089.1774183766. The cubic root of 258861630 is about 637.3175733305.

The spelling of 258861630 in words is "two hundred fifty-eight million, eight hundred sixty-one thousand, six hundred thirty".