257078030 has 16 divisors (see below), whose sum is σ = 504807984. Its totient is φ = 93482880.

The previous prime is 257078021. The next prime is 257078039. The reversal of 257078030 is 30870752.

It is an interprime number because it is at equal distance from previous prime (257078021) and next prime (257078039).

It is a super-2 number, since 2×257078030² = 132178227017361800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257078039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1168427 + ... + 1168646.

It is an arithmetic number, because the mean of its divisors is an integer number (31550499).

Almost surely, 2^257078030 is an apocalyptic number.

257078030 is a deficient number, since it is larger than the sum of its proper divisors (247729954).

257078030 is a wasteful number, since it uses less digits than its factorization.

257078030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337091.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 257078030 is about 16033.6530460154. The cubic root of 257078030 is about 635.8504569757.

The spelling of 257078030 in words is "two hundred fifty-seven million, seventy-eight thousand, thirty".