72654778 has 16 divisors (see below), whose sum is σ = 127448640. Its totient is φ = 30413376.

The previous prime is 72654767. The next prime is 72654781. The reversal of 72654778 is 87745627.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59743 + ... + 60946.

It is an arithmetic number, because the mean of its divisors is an integer number (7965540).

Almost surely, 2^72654778 is an apocalyptic number.

72654778 is a deficient number, since it is larger than the sum of its proper divisors (54793862).

72654778 is a wasteful number, since it uses less digits than its factorization.

72654778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120741.

The product of its digits is 658560, while the sum is 46.

The square root of 72654778 is about 8523.7772143575. Note that the first 3 decimals coincide. The cubic root of 72654778 is about 417.2740656670.

The spelling of 72654778 in words is "seventy-two million, six hundred fifty-four thousand, seven hundred seventy-eight".