72199044 has 72 divisors (see below), whose sum is σ = 187797792. Its totient is φ = 23379840.

The previous prime is 72199037. The next prime is 72199079. The reversal of 72199044 is 44099127.

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, 217959 + ... + 218289.

Almost surely, 2^72199044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72199044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93898896).

72199044 is an abundant number, since it is smaller than the sum of its proper divisors (115598748).

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

72199044 is a wasteful number, since it uses less digits than its factorization.

72199044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 72199044 is about 8497.0020595502. The cubic root of 72199044 is about 416.3997713348.

The spelling of 72199044 in words is "seventy-two million, one hundred ninety-nine thousand, forty-four".