72289977 has 8 divisors (see below), whose sum is σ = 97607040. Its totient is φ = 47583120.

The previous prime is 72289963. The next prime is 72289981. The reversal of 72289977 is 77998227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72289977 - 2⁴ = 72289961 is a prime.

It is a super-3 number, since 3×72289977³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (72289937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152274 + ... + 152747.

It is an arithmetic number, because the mean of its divisors is an integer number (12200880).

Almost surely, 2^72289977 is an apocalyptic number.

It is an amenable number.

72289977 is a deficient number, since it is larger than the sum of its proper divisors (25317063).

72289977 is a wasteful number, since it uses less digits than its factorization.

72289977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305103.

The product of its digits is 889056, while the sum is 51.

The square root of 72289977 is about 8502.3512630331. The cubic root of 72289977 is about 416.5745132379.

It can be divided in two parts, 7228 and 9977, that added together give a triangular number (17205 = T₁₈₅).

The spelling of 72289977 in words is "seventy-two million, two hundred eighty-nine thousand, nine hundred seventy-seven".