258778450 has 48 divisors (see below), whose sum is σ = 551661120. Its totient is φ = 88470720.

The previous prime is 258778441. The next prime is 258778469. The reversal of 258778450 is 54877852.

It is a self number, because there is not a number n which added to its sum of digits gives 258778450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154216 + ... + 155884.

It is an arithmetic number, because the mean of its divisors is an integer number (11492940).

Almost surely, 2^258778450 is an apocalyptic number.

258778450 is an abundant number, since it is smaller than the sum of its proper divisors (292882670).

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

258778450 is a wasteful number, since it uses less digits than its factorization.

258778450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131 (or 2126 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 46.

The square root of 258778450 is about 16086.5922432316. The cubic root of 258778450 is about 637.2493029385.

The spelling of 258778450 in words is "two hundred fifty-eight million, seven hundred seventy-eight thousand, four hundred fifty".