72681532 has 24 divisors (see below), whose sum is σ = 158578560. Its totient is φ = 28317360.

The previous prime is 72681509. The next prime is 72681547. The reversal of 72681532 is 23518627.

It is a happy number.

It is a congruent number.

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, 117682 + ... + 118297.

It is an arithmetic number, because the mean of its divisors is an integer number (6607440).

Almost surely, 2^72681532 is an apocalyptic number.

It is an amenable number.

72681532 is an abundant number, since it is smaller than the sum of its proper divisors (85897028).

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

72681532 is a wasteful number, since it uses less digits than its factorization.

72681532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236001 (or 235999 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 72681532 is about 8525.3464445734. The cubic root of 72681532 is about 417.3252776251.

The spelling of 72681532 in words is "seventy-two million, six hundred eighty-one thousand, five hundred thirty-two".