647235436 has 6 divisors (see below), whose sum is σ = 1132662020. Its totient is φ = 323617716.

The previous prime is 647235431. The next prime is 647235439. The reversal of 647235436 is 634532746.

It is a super-2 number, since 2×647235436² = 837827419228220192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (647235431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80904426 + ... + 80904433.

Almost surely, 2^647235436 is an apocalyptic number.

It is an amenable number.

647235436 is a deficient number, since it is larger than the sum of its proper divisors (485426584).

647235436 is a wasteful number, since it uses less digits than its factorization.

647235436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161808863 (or 161808861 counting only the distinct ones).

The product of its digits is 362880, while the sum is 40.

The square root of 647235436 is about 25440.8222351401. The cubic root of 647235436 is about 865.0092711760.

The spelling of 647235436 in words is "six hundred forty-seven million, two hundred thirty-five thousand, four hundred thirty-six".