72114778 has 4 divisors (see below), whose sum is σ = 108172170. Its totient is φ = 36057388.

The previous prime is 72114769. The next prime is 72114781. The reversal of 72114778 is 87741127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 53684929 + 18429849 = 7327^2 + 4293^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18028693 + ... + 18028696.

Almost surely, 2^72114778 is an apocalyptic number.

72114778 is a deficient number, since it is larger than the sum of its proper divisors (36057392).

72114778 is a wasteful number, since it uses less digits than its factorization.

72114778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36057391.

The product of its digits is 21952, while the sum is 37.

The square root of 72114778 is about 8492.0420394626. The cubic root of 72114778 is about 416.2377100803.

The spelling of 72114778 in words is "seventy-two million, one hundred fourteen thousand, seven hundred seventy-eight".