647385902 has 8 divisors (see below), whose sum is σ = 972988200. Its totient is φ = 323056504.

The previous prime is 647385847. The next prime is 647385919. The reversal of 647385902 is 209583746.

647385902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×647385902² = 838217012216707208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316952 + ... + 318987.

It is an arithmetic number, because the mean of its divisors is an integer number (121623525).

Almost surely, 2^647385902 is an apocalyptic number.

647385902 is a deficient number, since it is larger than the sum of its proper divisors (325602298).

647385902 is a wasteful number, since it uses less digits than its factorization.

647385902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636450.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 647385902 is about 25443.7792397277. The cubic root of 647385902 is about 865.0762969666.

The spelling of 647385902 in words is "six hundred forty-seven million, three hundred eighty-five thousand, nine hundred two".