72819770 has 8 divisors (see below), whose sum is σ = 131075604. Its totient is φ = 29127904.

The previous prime is 72819707. The next prime is 72819793. The reversal of 72819770 is 7791827.

It can be written as a sum of positive squares in 2 ways, for example, as 71453209 + 1366561 = 8453^2 + 1169^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3640979 + ... + 3640998.

Almost surely, 2^72819770 is an apocalyptic number.

72819770 is a deficient number, since it is larger than the sum of its proper divisors (58255834).

72819770 is a wasteful number, since it uses less digits than its factorization.

72819770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7281984.

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 72819770 is about 8533.4500643058. The cubic root of 72819770 is about 417.5896899352.

The spelling of 72819770 in words is "seventy-two million, eight hundred nineteen thousand, seven hundred seventy".