72777974 has 8 divisors (see below), whose sum is σ = 110248128. Its totient is φ = 36028600.

The previous prime is 72777959. The next prime is 72777979. The reversal of 72777974 is 47977727.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72777979) 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, 179942 + ... + 180345.

It is an arithmetic number, because the mean of its divisors is an integer number (13781016).

Almost surely, 2^72777974 is an apocalyptic number.

72777974 is a deficient number, since it is larger than the sum of its proper divisors (37470154).

72777974 is a wasteful number, since it uses less digits than its factorization.

72777974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360390.

The product of its digits is 1210104, while the sum is 50.

The square root of 72777974 is about 8531.0007619271. Note that the first 3 decimals coincide. The cubic root of 72777974 is about 417.5097806881.

It can be divided in two parts, 7277 and 7974, that added together give a palindrome (15251).

The spelling of 72777974 in words is "seventy-two million, seven hundred seventy-seven thousand, nine hundred seventy-four".