72775430 has 32 divisors (see below), whose sum is σ = 161227584. Its totient is φ = 23031936.

The previous prime is 72775397. The next prime is 72775433. The reversal of 72775430 is 3457727.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72775433) 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 15 ways as a sum of consecutive naturals, for example, 39077 + ... + 40896.

It is an arithmetic number, because the mean of its divisors is an integer number (5038362).

Almost surely, 2^72775430 is an apocalyptic number.

72775430 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72775430 is an abundant number, since it is smaller than the sum of its proper divisors (88452154).

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

72775430 is a wasteful number, since it uses less digits than its factorization.

72775430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80000.

The product of its (nonzero) digits is 41160, while the sum is 35.

The square root of 72775430 is about 8530.8516573669. The cubic root of 72775430 is about 417.5049158588.

The spelling of 72775430 in words is "seventy-two million, seven hundred seventy-five thousand, four hundred thirty".