72277779 has 8 divisors (see below), whose sum is σ = 110137600. Its totient is φ = 41301576.

The previous prime is 72277769. The next prime is 72277781. The reversal of 72277779 is 97777227.

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

It is not a de Polignac number, because 72277779 - 2⁷ = 72277651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72277769) 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, 1720879 + ... + 1720920.

It is an arithmetic number, because the mean of its divisors is an integer number (13767200).

Almost surely, 2^72277779 is an apocalyptic number.

72277779 is a deficient number, since it is larger than the sum of its proper divisors (37859821).

72277779 is a wasteful number, since it uses less digits than its factorization.

72277779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441809.

The product of its digits is 605052, while the sum is 48.

The square root of 72277779 is about 8501.6339017862. The cubic root of 72277779 is about 416.5510813969.

The spelling of 72277779 in words is "seventy-two million, two hundred seventy-seven thousand, seven hundred seventy-nine".