72235889840 has 40 divisors (see below), whose sum is σ = 167963521968. Its totient is φ = 28891761920.

The previous prime is 72235889827. The next prime is 72235889851. The reversal of 72235889840 is 4898853227.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1032614 + ... + 1100346.

Almost surely, 2^72235889840 is an apocalyptic number.

It is an amenable number.

72235889840 is an abundant number, since it is smaller than the sum of its proper divisors (95727632128).

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

72235889840 is a wasteful number, since it uses less digits than its factorization.

72235889840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81077 (or 81071 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 72235889840 in words is "seventy-two billion, two hundred thirty-five million, eight hundred eighty-nine thousand, eight hundred forty".