72969138 has 24 divisors (see below), whose sum is σ = 172472976. Its totient is φ = 22111800.

The previous prime is 72969137. The next prime is 72969161. The reversal of 72969138 is 83196927.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72969093 and 72969102.

It is not an unprimeable number, because it can be changed into a prime (72969137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184068 + ... + 184463.

It is an arithmetic number, because the mean of its divisors is an integer number (7186374).

Almost surely, 2^72969138 is an apocalyptic number.

72969138 is an abundant number, since it is smaller than the sum of its proper divisors (99503838).

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

72969138 is a wasteful number, since it uses less digits than its factorization.

72969138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368550 (or 368547 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 72969138 is about 8542.1974924489. The cubic root of 72969138 is about 417.8750150961.

The spelling of 72969138 in words is "seventy-two million, nine hundred sixty-nine thousand, one hundred thirty-eight".