74454390 has 80 divisors (see below), whose sum is σ = 212015232. Its totient is φ = 18683136.

The previous prime is 74454389. The next prime is 74454409. The reversal of 74454390 is 9345447.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11067 + ... + 16473.

Almost surely, 2^74454390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74454390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106007616).

74454390 is an abundant number, since it is smaller than the sum of its proper divisors (137560842).

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

74454390 is a wasteful number, since it uses less digits than its factorization.

74454390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5443 (or 5434 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 74454390 is about 8628.6957299467. The cubic root of 74454390 is about 420.6912087682.

The spelling of 74454390 in words is "seventy-four million, four hundred fifty-four thousand, three hundred ninety".