1238788057 has 4 divisors (see below), whose sum is σ = 1334079460. Its totient is φ = 1143496656.

The previous prime is 1238788051. The next prime is 1238788093. The reversal of 1238788057 is 7508878321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 261662976 + 977125081 = 16176^2 + 31259^2 .

It is a cyclic number.

It is not a de Polignac number, because 1238788057 - 2⁷ = 1238787929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1238788057.

It is not an unprimeable number, because it can be changed into a prime (1238788051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47645682 + ... + 47645707.

It is an arithmetic number, because the mean of its divisors is an integer number (333519865).

Almost surely, 2^1238788057 is an apocalyptic number.

It is an amenable number.

1238788057 is a deficient number, since it is larger than the sum of its proper divisors (95291403).

1238788057 is an equidigital number, since it uses as much as digits as its factorization.

1238788057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95291402.

The product of its (nonzero) digits is 752640, while the sum is 49.

The square root of 1238788057 is about 35196.4210822635. The cubic root of 1238788057 is about 1073.9869474097.

The spelling of 1238788057 in words is "one billion, two hundred thirty-eight million, seven hundred eighty-eight thousand, fifty-seven".