74543840 has 192 divisors, whose sum is σ = 220631040. Its totient is φ = 23224320.

The previous prime is 74543831. The next prime is 74543869. The reversal of 74543840 is 4834547.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 74543840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 659624 + ... + 659736.

It is an arithmetic number, because the mean of its divisors is an integer number (1149120).

Almost surely, 2^74543840 is an apocalyptic number.

74543840 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 74543840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110315520).

74543840 is an abundant number, since it is smaller than the sum of its proper divisors (146087200).

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

74543840 is a wasteful number, since it uses less digits than its factorization.

74543840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 74543840 is about 8633.8774603303. The cubic root of 74543840 is about 420.8596150847.

The spelling of 74543840 in words is "seventy-four million, five hundred forty-three thousand, eight hundred forty".