1157370806 has 4 divisors (see below), whose sum is σ = 1736056212. Its totient is φ = 578685402.

The previous prime is 1157370763. The next prime is 1157370821. The reversal of 1157370806 is 6080737511.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1157370806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 289342700 + ... + 289342703.

It is an arithmetic number, because the mean of its divisors is an integer number (434014053).

Almost surely, 2^1157370806 is an apocalyptic number.

1157370806 is a deficient number, since it is larger than the sum of its proper divisors (578685406).

1157370806 is an equidigital number, since it uses as much as digits as its factorization.

1157370806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578685405.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 1157370806 is about 34020.1529391036. The cubic root of 1157370806 is about 1049.9231405570.

The spelling of 1157370806 in words is "one billion, one hundred fifty-seven million, three hundred seventy thousand, eight hundred six".