258979428 has 72 divisors (see below), whose sum is σ = 711946872. Its totient is φ = 79045632.

The previous prime is 258979393. The next prime is 258979439. The reversal of 258979428 is 824979852.

It can be written as a sum of positive squares in 4 ways, for example, as 98247744 + 160731684 = 9912^2 + 12678^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16926 + ... + 28362.

It is an arithmetic number, because the mean of its divisors is an integer number (9888151).

Almost surely, 2^258979428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 258979428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355973436).

258979428 is an abundant number, since it is smaller than the sum of its proper divisors (452967444).

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

258979428 is a wasteful number, since it uses less digits than its factorization.

258979428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11501 (or 11496 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 258979428 is about 16092.8377857978. The cubic root of 258979428 is about 637.4142315986.

The spelling of 258979428 in words is "two hundred fifty-eight million, nine hundred seventy-nine thousand, four hundred twenty-eight".