747638806 has 4 divisors (see below), whose sum is σ = 1121458212. Its totient is φ = 373819402.

The previous prime is 747638777. The next prime is 747638819. The reversal of 747638806 is 608836747.

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

It is a self number, because there is not a number n which added to its sum of digits gives 747638806.

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, 186909700 + ... + 186909703.

It is an arithmetic number, because the mean of its divisors is an integer number (280364553).

Almost surely, 2^747638806 is an apocalyptic number.

747638806 is a deficient number, since it is larger than the sum of its proper divisors (373819406).

747638806 is a wasteful number, since it uses less digits than its factorization.

747638806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373819405.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The square root of 747638806 is about 27342.9845847157. The cubic root of 747638806 is about 907.6058331393.

The spelling of 747638806 in words is "seven hundred forty-seven million, six hundred thirty-eight thousand, eight hundred six".