74454640 has 60 divisors (see below), whose sum is σ = 187481304. Its totient is φ = 27485952.

The previous prime is 74454631. The next prime is 74454643. The reversal of 74454640 is 4645447.

It is a junction number, because it is equal to n+sod(n) for n = 74454596 and 74454605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74454643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10767 + ... + 16273.

Almost surely, 2^74454640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74454640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93740652).

74454640 is an abundant number, since it is smaller than the sum of its proper divisors (113026664).

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

74454640 is a wasteful number, since it uses less digits than its factorization.

74454640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5546 (or 5527 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 74454640 is about 8628.7102164808. The cubic root of 74454640 is about 420.6916796277.

The spelling of 74454640 in words is "seventy-four million, four hundred fifty-four thousand, six hundred forty".