712165638 has 48 divisors (see below), whose sum is σ = 1511777520. Its totient is φ = 223618752.

The previous prime is 712165609. The next prime is 712165639. The reversal of 712165638 is 836561217.

Its product of digits (60480) is a multiple of the sum of its prime divisors (1890).

It is a junction number, because it is equal to n+sod(n) for n = 712165596 and 712165605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (712165639) 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 in 23 ways as a sum of consecutive naturals, for example, 425868 + ... + 427536.

It is an arithmetic number, because the mean of its divisors is an integer number (31495365).

Almost surely, 2^712165638 is an apocalyptic number.

712165638 is an abundant number, since it is smaller than the sum of its proper divisors (799611882).

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

712165638 is a wasteful number, since it uses less digits than its factorization.

712165638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909 (or 1890 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 712165638 is about 26686.4317210076. The cubic root of 712165638 is about 893.0182582656.

The spelling of 712165638 in words is "seven hundred twelve million, one hundred sixty-five thousand, six hundred thirty-eight".