57706906 has 4 divisors (see below), whose sum is σ = 86560362. Its totient is φ = 28853452.

The previous prime is 57706879. The next prime is 57706907. The reversal of 57706906 is 60960775.

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

It can be written as a sum of positive squares in only one way, i.e., 54626881 + 3080025 = 7391^2 + 1755^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (57706907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14426725 + ... + 14426728.

Almost surely, 2^57706906 is an apocalyptic number.

57706906 is a deficient number, since it is larger than the sum of its proper divisors (28853456).

57706906 is a wasteful number, since it uses less digits than its factorization.

57706906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28853455.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 57706906 is about 7596.5061706024. The cubic root of 57706906 is about 386.4345335112.

The spelling of 57706906 in words is "fifty-seven million, seven hundred six thousand, nine hundred six".