72669534 has 32 divisors (see below), whose sum is σ = 171832320. Its totient is φ = 20046432.

The previous prime is 72669521. The next prime is 72669539. The reversal of 72669534 is 43596627.

It is a super-2 number, since 2×72669534² = 10561722343554312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72669539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28614 + ... + 31049.

It is an arithmetic number, because the mean of its divisors is an integer number (5369760).

Almost surely, 2^72669534 is an apocalyptic number.

72669534 is an abundant number, since it is smaller than the sum of its proper divisors (99162786).

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

72669534 is a wasteful number, since it uses less digits than its factorization.

72669534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59704.

The product of its digits is 272160, while the sum is 42.

The square root of 72669534 is about 8524.6427491127. The cubic root of 72669534 is about 417.3023128541.

The spelling of 72669534 in words is "seventy-two million, six hundred sixty-nine thousand, five hundred thirty-four".