72771448 has 32 divisors (see below), whose sum is σ = 142832160. Its totient is φ = 34693120.

The previous prime is 72771431. The next prime is 72771467. The reversal of 72771448 is 84417727.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 72771448.

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, 113208 + ... + 113848.

It is an arithmetic number, because the mean of its divisors is an integer number (4463505).

Almost surely, 2^72771448 is an apocalyptic number.

It is an amenable number.

72771448 is a deficient number, since it is larger than the sum of its proper divisors (70060712).

72771448 is a wasteful number, since it uses less digits than its factorization.

72771448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287 (or 1283 counting only the distinct ones).

The product of its digits is 87808, while the sum is 40.

The square root of 72771448 is about 8530.6182659875. The cubic root of 72771448 is about 417.4973009495.

The spelling of 72771448 in words is "seventy-two million, seven hundred seventy-one thousand, four hundred forty-eight".