72691356 has 24 divisors (see below), whose sum is σ = 171938704. Its totient is φ = 23898240.

The previous prime is 72691351. The next prime is 72691361. The reversal of 72691356 is 65319627.

It is an interprime number because it is at equal distance from previous prime (72691351) and next prime (72691361).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72691351) 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 7 ways as a sum of consecutive naturals, for example, 40615 + ... + 42366.

Almost surely, 2^72691356 is an apocalyptic number.

It is an amenable number.

72691356 is an abundant number, since it is smaller than the sum of its proper divisors (99247348).

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

72691356 is a wasteful number, since it uses less digits than its factorization.

72691356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83061 (or 83059 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 72691356 is about 8525.9225893741. The cubic root of 72691356 is about 417.3440793698.

The spelling of 72691356 in words is "seventy-two million, six hundred ninety-one thousand, three hundred fifty-six".