72784275 has 12 divisors (see below), whose sum is σ = 120336792. Its totient is φ = 38818240.

The previous prime is 72784273. The next prime is 72784303. The reversal of 72784275 is 57248727.

It is not a de Polignac number, because 72784275 - 2¹ = 72784273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72784273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 485154 + ... + 485303.

It is an arithmetic number, because the mean of its divisors is an integer number (10028066).

Almost surely, 2^72784275 is an apocalyptic number.

72784275 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

72784275 is a deficient number, since it is larger than the sum of its proper divisors (47552517).

72784275 is a wasteful number, since it uses less digits than its factorization.

72784275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970470 (or 970465 counting only the distinct ones).

The product of its digits is 219520, while the sum is 42.

The square root of 72784275 is about 8531.3700541003. The cubic root of 72784275 is about 417.5218294489.

The spelling of 72784275 in words is "seventy-two million, seven hundred eighty-four thousand, two hundred seventy-five".