258781250 has 126 divisors (see below), whose sum is σ = 611183583. Its totient is φ = 81900000.

The previous prime is 258781249. The next prime is 258781279. The reversal of 258781250 is 52187852.

It is a happy number.

It can be written as a sum of positive squares in 11 ways, for example, as 258534241 + 247009 = 16079^2 + 497^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=11375.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 19906244 + ... + 19906256.

Almost surely, 2^258781250 is an apocalyptic number.

258781250 is an abundant number, since it is smaller than the sum of its proper divisors (352402333).

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

258781250 is an frugal number, since it uses more digits than its factorization.

258781250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 258781250 is about 16086.6792719940. The cubic root of 258781250 is about 637.2516012901.

The spelling of 258781250 in words is "two hundred fifty-eight million, seven hundred eighty-one thousand, two hundred fifty".