257036778 has 12 divisors (see below), whose sum is σ = 556913058. Its totient is φ = 85678920.

The previous prime is 257036777. The next prime is 257036837. The reversal of 257036778 is 877630752.

257036778 is a `hidden beast` number, since 2 + 570 + 3 + 6 + 7 + 78 = 666.

257036778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 236759769 + 20277009 = 15387^2 + 4503^2 .

It is not an unprimeable number, because it can be changed into a prime (257036777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7139893 + ... + 7139928.

Almost surely, 2^257036778 is an apocalyptic number.

257036778 is an abundant number, since it is smaller than the sum of its proper divisors (299876280).

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

257036778 is a wasteful number, since it uses less digits than its factorization.

257036778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14279829 (or 14279826 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The square root of 257036778 is about 16032.3665751504. The cubic root of 257036778 is about 635.8164445967.

The spelling of 257036778 in words is "two hundred fifty-seven million, thirty-six thousand, seven hundred seventy-eight".