74559420 has 288 divisors, whose sum is σ = 270547200. Its totient is φ = 16982784.

The previous prime is 74559391. The next prime is 74559449. The reversal of 74559420 is 2495547.

74559420 is a `hidden beast` number, since 7 + 45 + 594 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (74559391) and next prime (74559449).

It is a super-2 number, since 2×74559420² = 11118214221472800, 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 an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1733919 + ... + 1733961.

It is an arithmetic number, because the mean of its divisors is an integer number (939400).

Almost surely, 2^74559420 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 74559420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135273600).

74559420 is an abundant number, since it is smaller than the sum of its proper divisors (195987780).

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

74559420 is a wasteful number, since it uses less digits than its factorization.

74559420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 74559420 is about 8634.7796729274. The cubic root of 74559420 is about 420.8889335637. Note that the first 3 decimals are identical.

The spelling of 74559420 in words is "seventy-four million, five hundred fifty-nine thousand, four hundred twenty".