258228628 has 18 divisors (see below), whose sum is σ = 525680106. Its totient is φ = 110669328.

The previous prime is 258228611. The next prime is 258228629. The reversal of 258228628 is 826822852.

It can be written as a sum of positive squares in only one way, i.e., 195216784 + 63011844 = 13972^2 + 7938^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258228629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 658551 + ... + 658942.

Almost surely, 2^258228628 is an apocalyptic number.

258228628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

258228628 is an abundant number, since it is smaller than the sum of its proper divisors (267451478).

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

258228628 is a wasteful number, since it uses less digits than its factorization.

258228628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317511 (or 1317502 counting only the distinct ones).

The product of its digits is 245760, while the sum is 43.

The square root of 258228628 is about 16069.4937070214. The cubic root of 258228628 is about 636.7976654807.

The spelling of 258228628 in words is "two hundred fifty-eight million, two hundred twenty-eight thousand, six hundred twenty-eight".