258912720 has 320 divisors, whose sum is σ = 1031719680. Its totient is φ = 58982400.

The previous prime is 258912683. The next prime is 258912727. The reversal of 258912720 is 27219852.

258912720 is a `hidden beast` number, since 2 + 589 + 1 + 2 + 72 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258912727) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 403600 + ... + 404240.

It is an arithmetic number, because the mean of its divisors is an integer number (3224124).

Almost surely, 2^258912720 is an apocalyptic number.

258912720 is a gapful number since it is divisible by the number (20) 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 258912720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515859840).

258912720 is an abundant number, since it is smaller than the sum of its proper divisors (772806960).

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

258912720 is a wasteful number, since it uses less digits than its factorization.

258912720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 258912720 is about 16090.7650532844. The cubic root of 258912720 is about 637.3594984483.

The spelling of 258912720 in words is "two hundred fifty-eight million, nine hundred twelve thousand, seven hundred twenty".