72280146 has 8 divisors (see below), whose sum is σ = 144560304. Its totient is φ = 24093380.

The previous prime is 72280081. The next prime is 72280157. The reversal of 72280146 is 64108227.

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

72280146 is an admirable number.

It is a Curzon number.

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, 6023340 + ... + 6023351.

It is an arithmetic number, because the mean of its divisors is an integer number (18070038).

Almost surely, 2^72280146 is an apocalyptic number.

72280146 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72280146 is a wasteful number, since it uses less digits than its factorization.

72280146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12046696.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 72280146 is about 8501.7731091814. The cubic root of 72280146 is about 416.5556285097. Note that the first 3 decimals are identical.

The spelling of 72280146 in words is "seventy-two million, two hundred eighty thousand, one hundred forty-six".