258878772 has 18 divisors (see below), whose sum is σ = 654388098. Its totient is φ = 86292912.

The previous prime is 258878759. The next prime is 258878801. The reversal of 258878772 is 277878852.

It can be written as a sum of positive squares in only one way, i.e., 255872016 + 3006756 = 15996^2 + 1734^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3595503 + ... + 3595574.

Almost surely, 2^258878772 is an apocalyptic number.

It is an amenable number.

258878772 is an abundant number, since it is smaller than the sum of its proper divisors (395509326).

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

258878772 is a wasteful number, since it uses less digits than its factorization.

258878772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7191087 (or 7191082 counting only the distinct ones).

The product of its digits is 3512320, while the sum is 54.

The square root of 258878772 is about 16089.7101279047. The cubic root of 258878772 is about 637.3316408933.

The spelling of 258878772 in words is "two hundred fifty-eight million, eight hundred seventy-eight thousand, seven hundred seventy-two".