258223812 has 144 divisors (see below), whose sum is σ = 798809088. Its totient is φ = 63060480.

The previous prime is 258223811. The next prime is 258223837. The reversal of 258223812 is 218322852.

258223812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×258223812² = 133359074167622688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (258223811) 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, 266553 + ... + 267519.

Almost surely, 2^258223812 is an apocalyptic number.

258223812 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 258223812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399404544).

258223812 is an abundant number, since it is smaller than the sum of its proper divisors (540585276).

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

258223812 is a wasteful number, since it uses less digits than its factorization.

258223812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026 (or 1007 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 258223812 is about 16069.3438571710. The cubic root of 258223812 is about 636.7937066676.

The spelling of 258223812 in words is "two hundred fifty-eight million, two hundred twenty-three thousand, eight hundred twelve".