647774076 has 12 divisors (see below), whose sum is σ = 1511472872. Its totient is φ = 215924688.

The previous prime is 647774063. The next prime is 647774111. The reversal of 647774076 is 670477746.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×647774076² = 839222507075307552, 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, 26990575 + ... + 26990598.

Almost surely, 2^647774076 is an apocalyptic number.

It is an amenable number.

647774076 is an abundant number, since it is smaller than the sum of its proper divisors (863698796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647774076 is a wasteful number, since it uses less digits than its factorization.

647774076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53981180 (or 53981178 counting only the distinct ones).

The product of its (nonzero) digits is 1382976, while the sum is 48.

The square root of 647774076 is about 25451.4061694045. The cubic root of 647774076 is about 865.2491629662.

The spelling of 647774076 in words is "six hundred forty-seven million, seven hundred seventy-four thousand, seventy-six".