258978540 has 48 divisors (see below), whose sum is σ = 744744672. Its totient is φ = 67193856.

The previous prime is 258978529. The next prime is 258978541. The reversal of 258978540 is 45879852.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 258978540.

It is not an unprimeable number, because it can be changed into a prime (258978541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56109 + ... + 60548.

It is an arithmetic number, because the mean of its divisors is an integer number (15515514).

Almost surely, 2^258978540 is an apocalyptic number.

258978540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258978540 is an abundant number, since it is smaller than the sum of its proper divisors (485766132).

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

258978540 is a wasteful number, since it uses less digits than its factorization.

258978540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116706 (or 116704 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The square root of 258978540 is about 16092.8101958608. The cubic root of 258978540 is about 637.4135030665.

The spelling of 258978540 in words is "two hundred fifty-eight million, nine hundred seventy-eight thousand, five hundred forty".