258633378 has 32 divisors (see below), whose sum is σ = 576649920. Its totient is φ = 85924800.

The previous prime is 258633373. The next prime is 258633391. The reversal of 258633378 is 873336852.

258633378 is a `hidden beast` number, since 2 + 5 + 8 + 633 + 3 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (258633373) 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, 8778 + ... + 24378.

It is an arithmetic number, because the mean of its divisors is an integer number (18020310).

Almost surely, 2^258633378 is an apocalyptic number.

258633378 is an abundant number, since it is smaller than the sum of its proper divisors (318016542).

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

258633378 is a wasteful number, since it uses less digits than its factorization.

258633378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15919 (or 15913 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 258633378 is about 16082.0825144009. The cubic root of 258633378 is about 637.1301993686.

It can be divided in two parts, 25863 and 3378, that added together give a square (29241 = 171²).

The spelling of 258633378 in words is "two hundred fifty-eight million, six hundred thirty-three thousand, three hundred seventy-eight".