72977386 has 8 divisors (see below), whose sum is σ = 109856484. Its totient is φ = 36358560.

The previous prime is 72977383. The next prime is 72977453. The reversal of 72977386 is 68377927.

It can be written as a sum of positive squares in 2 ways, for example, as 68376361 + 4601025 = 8269^2 + 2145^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72977381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64365 + ... + 65488.

Almost surely, 2^72977386 is an apocalyptic number.

72977386 is a deficient number, since it is larger than the sum of its proper divisors (36879098).

72977386 is a wasteful number, since it uses less digits than its factorization.

72977386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130136.

The product of its digits is 889056, while the sum is 49.

The square root of 72977386 is about 8542.6802585605. The cubic root of 72977386 is about 417.8907592100.

The spelling of 72977386 in words is "seventy-two million, nine hundred seventy-seven thousand, three hundred eighty-six".