74346640 has 20 divisors (see below), whose sum is σ = 172856124. Its totient is φ = 29738624.

The previous prime is 74346637. The next prime is 74346641. The reversal of 74346640 is 4664347.

It can be written as a sum of positive squares in 2 ways, for example, as 20939776 + 53406864 = 4576^2 + 7308^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 74346596 and 74346605.

It is not an unprimeable number, because it can be changed into a prime (74346641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464587 + ... + 464746.

Almost surely, 2^74346640 is an apocalyptic number.

It is an amenable number.

74346640 is an abundant number, since it is smaller than the sum of its proper divisors (98509484).

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

74346640 is a wasteful number, since it uses less digits than its factorization.

74346640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929346 (or 929340 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 74346640 is about 8622.4497679024. The cubic root of 74346640 is about 420.4881700926.

The spelling of 74346640 in words is "seventy-four million, three hundred forty-six thousand, six hundred forty".