72788978 has 8 divisors (see below), whose sum is σ = 109219968. Its totient is φ = 36382324.

The previous prime is 72788977. The next prime is 72789011. The reversal of 72788978 is 87988727.

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 (72788977) 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, 7175 + ... + 14037.

It is an arithmetic number, because the mean of its divisors is an integer number (13652496).

Almost surely, 2^72788978 is an apocalyptic number.

72788978 is a deficient number, since it is larger than the sum of its proper divisors (36430990).

72788978 is a wasteful number, since it uses less digits than its factorization.

72788978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12168.

The product of its digits is 3161088, while the sum is 56.

The square root of 72788978 is about 8531.6456794689. The cubic root of 72788978 is about 417.5308220638.

The spelling of 72788978 in words is "seventy-two million, seven hundred eighty-eight thousand, nine hundred seventy-eight".