258118728 has 64 divisors (see below), whose sum is σ = 739200000. Its totient is φ = 73576512.

The previous prime is 258118727. The next prime is 258118759. The reversal of 258118728 is 827811852.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 258118728.

It is not an unprimeable number, because it can be changed into a prime (258118727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82293 + ... + 85371.

It is an arithmetic number, because the mean of its divisors is an integer number (11550000).

Almost surely, 2^258118728 is an apocalyptic number.

258118728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

258118728 is an abundant number, since it is smaller than the sum of its proper divisors (481081272).

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

258118728 is a wasteful number, since it uses less digits than its factorization.

258118728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594 (or 3590 counting only the distinct ones).

The product of its digits is 71680, while the sum is 42.

The square root of 258118728 is about 16066.0738203209. The cubic root of 258118728 is about 636.7073140293.

The spelling of 258118728 in words is "two hundred fifty-eight million, one hundred eighteen thousand, seven hundred twenty-eight".