74304621 has 20 divisors (see below), whose sum is σ = 114002812. Its totient is φ = 48195648.

The previous prime is 74304599. The next prime is 74304647. The reversal of 74304621 is 12640347.

74304621 is a `hidden beast` number, since 7 + 4 + 30 + 4 + 621 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 70056900 + 4247721 = 8370^2 + 2061^2 .

It is not a de Polignac number, because 74304621 - 2⁶ = 74304557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74304121) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9400 + ... + 15393.

Almost surely, 2^74304621 is an apocalyptic number.

It is an amenable number.

74304621 is a deficient number, since it is larger than the sum of its proper divisors (39698191).

74304621 is a wasteful number, since it uses less digits than its factorization.

74304621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24842 (or 24833 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 74304621 is about 8620.0128190160. The cubic root of 74304621 is about 420.4089384373.

Adding to 74304621 its reverse (12640347), we get a palindrome (86944968).

The spelling of 74304621 in words is "seventy-four million, three hundred four thousand, six hundred twenty-one".