74283440 has 160 divisors (see below), whose sum is σ = 222842880. Its totient is φ = 22348800.

The previous prime is 74283427. The next prime is 74283449. The reversal of 74283440 is 4438247.

It is a junction number, because it is equal to n+sod(n) for n = 74283397 and 74283406.

It is not an unprimeable number, because it can be changed into a prime (74283449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190766 + ... + 191154.

It is an arithmetic number, because the mean of its divisors is an integer number (1392768).

Almost surely, 2^74283440 is an apocalyptic number.

74283440 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 74283440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111421440).

74283440 is an abundant number, since it is smaller than the sum of its proper divisors (148559440).

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

74283440 is a wasteful number, since it uses less digits than its factorization.

74283440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 445 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 74283440 is about 8618.7841369882. The cubic root of 74283440 is about 420.3689879028.

The spelling of 74283440 in words is "seventy-four million, two hundred eighty-three thousand, four hundred forty".