72199776 has 48 divisors (see below), whose sum is σ = 206756928. Its totient is φ = 21878400.

The previous prime is 72199741. The next prime is 72199789. The reversal of 72199776 is 67799127.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33130 + ... + 35241.

It is an arithmetic number, because the mean of its divisors is an integer number (4307436).

Almost surely, 2^72199776 is an apocalyptic number.

It is an amenable number.

72199776 is an abundant number, since it is smaller than the sum of its proper divisors (134557152).

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

72199776 is a wasteful number, since it uses less digits than its factorization.

72199776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68395 (or 68387 counting only the distinct ones).

The product of its digits is 333396, while the sum is 48.

The square root of 72199776 is about 8497.0451334567. The cubic root of 72199776 is about 416.4011785723.

The spelling of 72199776 in words is "seventy-two million, one hundred ninety-nine thousand, seven hundred seventy-six".