72889772 has 6 divisors (see below), whose sum is σ = 127557108. Its totient is φ = 36444884.

The previous prime is 72889771. The next prime is 72889799. The reversal of 72889772 is 27798827.

It is a super-3 number, since 3×72889772³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72889772.

It is not an unprimeable number, because it can be changed into a prime (72889771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9111218 + ... + 9111225.

It is an arithmetic number, because the mean of its divisors is an integer number (21259518).

Almost surely, 2^72889772 is an apocalyptic number.

It is an amenable number.

72889772 is a deficient number, since it is larger than the sum of its proper divisors (54667336).

72889772 is a wasteful number, since it uses less digits than its factorization.

72889772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18222447 (or 18222445 counting only the distinct ones).

The product of its digits is 790272, while the sum is 50.

The square root of 72889772 is about 8537.5507026313. The cubic root of 72889772 is about 417.7234574157.

The spelling of 72889772 in words is "seventy-two million, eight hundred eighty-nine thousand, seven hundred seventy-two".