258676440 has 64 divisors (see below), whose sum is σ = 846581760. Its totient is φ = 62709120.

The previous prime is 258676409. The next prime is 258676441. The reversal of 258676440 is 44676852.

It is a super-2 number, since 2×258676440² = 133827001222147200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 258676392 and 258676401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258676441) 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, 96664 + ... + 99303.

It is an arithmetic number, because the mean of its divisors is an integer number (13227840).

Almost surely, 2^258676440 is an apocalyptic number.

258676440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258676440 is an abundant number, since it is smaller than the sum of its proper divisors (587905320).

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

258676440 is a wasteful number, since it uses less digits than its factorization.

258676440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195992 (or 195988 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 258676440 is about 16083.4212778252. The cubic root of 258676440 is about 637.1655577567.

The spelling of 258676440 in words is "two hundred fifty-eight million, six hundred seventy-six thousand, four hundred forty".