258471840 has 96 divisors (see below), whose sum is σ = 888221376. Its totient is φ = 62658560.

The previous prime is 258471833. The next prime is 258471853. The reversal of 258471840 is 48174852.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19197 + ... + 29756.

It is an arithmetic number, because the mean of its divisors is an integer number (9252306).

Almost surely, 2^258471840 is an apocalyptic number.

258471840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258471840 is an abundant number, since it is smaller than the sum of its proper divisors (629749536).

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

258471840 is a wasteful number, since it uses less digits than its factorization.

258471840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48982 (or 48974 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 258471840 is about 16077.0594326201. The cubic root of 258471840 is about 636.9975248547.

The spelling of 258471840 in words is "two hundred fifty-eight million, four hundred seventy-one thousand, eight hundred forty".