74487420 has 144 divisors (see below), whose sum is σ = 266692608. Its totient is φ = 16467840.

The previous prime is 74487403. The next prime is 74487463. The reversal of 74487420 is 2478447.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38107 + ... + 40013.

It is an arithmetic number, because the mean of its divisors is an integer number (1852032).

Almost surely, 2^74487420 is an apocalyptic number.

74487420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74487420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133346304).

74487420 is an abundant number, since it is smaller than the sum of its proper divisors (192205188).

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

74487420 is a wasteful number, since it uses less digits than its factorization.

74487420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960 (or 1955 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 74487420 is about 8630.6094802163. The cubic root of 74487420 is about 420.7534096061.

The spelling of 74487420 in words is "seventy-four million, four hundred eighty-seven thousand, four hundred twenty".