257228018 has 16 divisors (see below), whose sum is σ = 400747776. Its totient is φ = 123696720.

The previous prime is 257227981. The next prime is 257228093. The reversal of 257228018 is 810822752.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2621 + ... + 22832.

It is an arithmetic number, because the mean of its divisors is an integer number (25046736).

Almost surely, 2^257228018 is an apocalyptic number.

257228018 is a deficient number, since it is larger than the sum of its proper divisors (143519758).

257228018 is a wasteful number, since it uses less digits than its factorization.

257228018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25649.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 257228018 is about 16038.3296511825. The cubic root of 257228018 is about 635.9740918075.

The spelling of 257228018 in words is "two hundred fifty-seven million, two hundred twenty-eight thousand, eighteen".