72277865 has 8 divisors (see below), whose sum is σ = 94618368. Its totient is φ = 52565680.

The previous prime is 72277861. The next prime is 72277871. The reversal of 72277865 is 56877227.

It is a happy number.

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

It is not a de Polignac number, because 72277865 - 2² = 72277861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72277861) 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, 657017 + ... + 657126.

It is an arithmetic number, because the mean of its divisors is an integer number (11827296).

Almost surely, 2^72277865 is an apocalyptic number.

It is an amenable number.

72277865 is a deficient number, since it is larger than the sum of its proper divisors (22340503).

72277865 is a wasteful number, since it uses less digits than its factorization.

72277865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314159.

The product of its digits is 329280, while the sum is 44.

The square root of 72277865 is about 8501.6389596360. The cubic root of 72277865 is about 416.5512466084.

It can be divided in two parts, 722 and 77865, that added together give a palindrome (78587).

The spelling of 72277865 in words is "seventy-two million, two hundred seventy-seven thousand, eight hundred sixty-five".