74403840 has 208 divisors, whose sum is σ = 273644928. Its totient is φ = 16908288.

The previous prime is 74403817. The next prime is 74403853. The reversal of 74403840 is 4830447.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 74403798 and 74403807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429994 + ... + 430166.

Almost surely, 2^74403840 is an apocalyptic number.

74403840 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 74403840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136822464).

74403840 is an abundant number, since it is smaller than the sum of its proper divisors (199241088).

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

74403840 is a wasteful number, since it uses less digits than its factorization.

74403840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 74403840 is about 8625.7660529370. The cubic root of 74403840 is about 420.5959793032.

The spelling of 74403840 in words is "seventy-four million, four hundred three thousand, eight hundred forty".