74455380 has 72 divisors (see below), whose sum is σ = 229584264. Its totient is φ = 19526400.

The previous prime is 74455363. The next prime is 74455387. The reversal of 74455380 is 8355447.

It can be written as a sum of positive squares in 4 ways, for example, as 12996 + 74442384 = 114^2 + 8628^2 .

It is a super-2 number, since 2×74455380² = 11087207221888800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74455387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7590 + ... + 14370.

Almost surely, 2^74455380 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 74455380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114792132).

74455380 is an abundant number, since it is smaller than the sum of its proper divisors (155128884).

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

74455380 is a wasteful number, since it uses less digits than its factorization.

74455380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6857 (or 6852 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 74455380 is about 8628.7530964792. The cubic root of 74455380 is about 420.6930733659.

The spelling of 74455380 in words is "seventy-four million, four hundred fifty-five thousand, three hundred eighty".