258718812 has 144 divisors (see below), whose sum is σ = 709287936. Its totient is φ = 73180800.

The previous prime is 258718807. The next prime is 258718819. The reversal of 258718812 is 218817852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258718819) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2037093 + ... + 2037219.

Almost surely, 2^258718812 is an apocalyptic number.

258718812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 258718812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354643968).

258718812 is an abundant number, since it is smaller than the sum of its proper divisors (450569124).

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

258718812 is a wasteful number, since it uses less digits than its factorization.

258718812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 227 counting only the distinct ones).

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

The square root of 258718812 is about 16084.7384809328. The cubic root of 258718812 is about 637.2003457529.

The spelling of 258718812 in words is "two hundred fifty-eight million, seven hundred eighteen thousand, eight hundred twelve".