257040702 has 120 divisors (see below), whose sum is σ = 633318840. Its totient is φ = 77682240.

The previous prime is 257040701. The next prime is 257040781. The reversal of 257040702 is 207040752.

257040702 is a `hidden beast` number, since 257 + 0 + 407 + 0 + 2 = 666.

257040702 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257040701) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4213752 + ... + 4213812.

It is an arithmetic number, because the mean of its divisors is an integer number (5277657).

Almost surely, 2^257040702 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257040702, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316659420).

257040702 is an abundant number, since it is smaller than the sum of its proper divisors (376278138).

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

257040702 is a wasteful number, since it uses less digits than its factorization.

257040702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 257040702 is about 16032.4889521247. The cubic root of 257040702 is about 635.8196801013.

The spelling of 257040702 in words is "two hundred fifty-seven million, forty thousand, seven hundred two".