238947420657 has 16 divisors (see below), whose sum is σ = 347974179840. Its totient is φ = 144643995600.

The previous prime is 238947420623. The next prime is 238947420667. The reversal of 238947420657 is 756024749832.

It is not a de Polignac number, because 238947420657 - 2²⁶ = 238880311793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 238947420597 and 238947420606.

It is not an unprimeable number, because it can be changed into a prime (238947420617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4287469 + ... + 4342842.

It is an arithmetic number, because the mean of its divisors is an integer number (21748386240).

Almost surely, 2^238947420657 is an apocalyptic number.

It is an amenable number.

238947420657 is a deficient number, since it is larger than the sum of its proper divisors (109026759183).

238947420657 is a wasteful number, since it uses less digits than its factorization.

238947420657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8631164.

The product of its (nonzero) digits is 20321280, while the sum is 57.

The spelling of 238947420657 in words is "two hundred thirty-eight billion, nine hundred forty-seven million, four hundred twenty thousand, six hundred fifty-seven".