72446146 has 8 divisors (see below), whose sum is σ = 115061580. Its totient is φ = 34092288.

The previous prime is 72446137. The next prime is 72446173. The reversal of 72446146 is 64164427.

It can be written as a sum of positive squares in 2 ways, for example, as 72437121 + 9025 = 8511^2 + 95^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 2130769 = 72446146 / (7 + 2 + 4 + 4 + 6 + 1 + 4 + 6).

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, 1065351 + ... + 1065418.

Almost surely, 2^72446146 is an apocalyptic number.

72446146 is a deficient number, since it is larger than the sum of its proper divisors (42615434).

72446146 is a wasteful number, since it uses less digits than its factorization.

72446146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130788.

The product of its digits is 32256, while the sum is 34.

The square root of 72446146 is about 8511.5301797033. The cubic root of 72446146 is about 416.8742746380.

The spelling of 72446146 in words is "seventy-two million, four hundred forty-six thousand, one hundred forty-six".