109138572 has 72 divisors (see below), whose sum is σ = 294289632. Its totient is φ = 33984000.

The previous prime is 109138553. The next prime is 109138621. The reversal of 109138572 is 275831901.

It is a super-2 number, since 2×109138572² = 23822455796398368, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91822 + ... + 93002.

It is an arithmetic number, because the mean of its divisors is an integer number (4087356).

Almost surely, 2^109138572 is an apocalyptic number.

109138572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109138572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147144816).

109138572 is an abundant number, since it is smaller than the sum of its proper divisors (185151060).

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

109138572 is a wasteful number, since it uses less digits than its factorization.

109138572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359 (or 1354 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 109138572 is about 10446.9407962331. The cubic root of 109138572 is about 477.8879600621.

The spelling of 109138572 in words is "one hundred nine million, one hundred thirty-eight thousand, five hundred seventy-two".