258115140 has 48 divisors (see below), whose sum is σ = 803026560. Its totient is φ = 68830560.

The previous prime is 258115129. The next prime is 258115153. The reversal of 258115140 is 41511852.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 238456 + ... + 239535.

It is an arithmetic number, because the mean of its divisors is an integer number (16729720).

Almost surely, 2^258115140 is an apocalyptic number.

258115140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258115140 is an abundant number, since it is smaller than the sum of its proper divisors (544911420).

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

258115140 is a wasteful number, since it uses less digits than its factorization.

258115140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478009 (or 478001 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 258115140 is about 16065.9621560615. The cubic root of 258115140 is about 636.7043638154.

Adding to 258115140 its reverse (41511852), we get a palindrome (299626992).

The spelling of 258115140 in words is "two hundred fifty-eight million, one hundred fifteen thousand, one hundred forty".