257023198 has 8 divisors (see below), whose sum is σ = 386379792. Its totient is φ = 128229936.

The previous prime is 257023181. The next prime is 257023243. The reversal of 257023198 is 891320752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139690 + ... + 141517.

It is an arithmetic number, because the mean of its divisors is an integer number (48297474).

Almost surely, 2^257023198 is an apocalyptic number.

257023198 is a deficient number, since it is larger than the sum of its proper divisors (129356594).

257023198 is a wasteful number, since it uses less digits than its factorization.

257023198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281666.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 257023198 is about 16031.9430512961. The cubic root of 257023198 is about 635.8052470559.

It can be divided in two parts, 25702 and 3198, that added together give a square (28900 = 170²).

The spelling of 257023198 in words is "two hundred fifty-seven million, twenty-three thousand, one hundred ninety-eight".