642719232 has 160 divisors (see below), whose sum is σ = 2003443200. Its totient is φ = 202881024.

The previous prime is 642719201. The next prime is 642719261. The reversal of 642719232 is 232917246.

642719232 is a `hidden beast` number, since 642 + 7 + 1 + 9 + 2 + 3 + 2 = 666.

It is a super-2 number, since 2×642719232² = 826176022365339648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261433 + ... + 263879.

It is an arithmetic number, because the mean of its divisors is an integer number (12521520).

Almost surely, 2^642719232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642719232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1001721600).

642719232 is an abundant number, since it is smaller than the sum of its proper divisors (1360723968).

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

642719232 is a wasteful number, since it uses less digits than its factorization.

642719232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493 (or 2471 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 642719232 is about 25351.9078572008. The cubic root of 642719232 is about 862.9926531404.

The spelling of 642719232 in words is "six hundred forty-two million, seven hundred nineteen thousand, two hundred thirty-two".