72305474 has 16 divisors (see below), whose sum is σ = 111708600. Its totient is φ = 35074944.

The previous prime is 72305473. The next prime is 72305483. The reversal of 72305474 is 47450327.

It can be written as a sum of positive squares in 4 ways, for example, as 71995225 + 310249 = 8485^2 + 557^2 .

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 72305474.

It is not an unprimeable number, because it can be changed into a prime (72305473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29072 + ... + 31460.

Almost surely, 2^72305474 is an apocalyptic number.

72305474 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

72305474 is a deficient number, since it is larger than the sum of its proper divisors (39403126).

72305474 is a wasteful number, since it uses less digits than its factorization.

72305474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837.

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 72305474 is about 8503.2625503391. The cubic root of 72305474 is about 416.6042785168.

The spelling of 72305474 in words is "seventy-two million, three hundred five thousand, four hundred seventy-four".