74724440 has 64 divisors (see below), whose sum is σ = 194088960. Its totient is φ = 25361280.

The previous prime is 74724437. The next prime is 74724443. The reversal of 74724440 is 4442747.

It is an interprime number because it is at equal distance from previous prime (74724437) and next prime (74724443).

It is a junction number, because it is equal to n+sod(n) for n = 74724397 and 74724406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74724443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27545 + ... + 30135.

It is an arithmetic number, because the mean of its divisors is an integer number (3032640).

Almost surely, 2^74724440 is an apocalyptic number.

74724440 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 74724440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97044480).

74724440 is an abundant number, since it is smaller than the sum of its proper divisors (119364520).

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

74724440 is a wasteful number, since it uses less digits than its factorization.

74724440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712 (or 2708 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 32.

The square root of 74724440 is about 8644.3299335460. The cubic root of 74724440 is about 421.1992181386.

The spelling of 74724440 in words is "seventy-four million, seven hundred twenty-four thousand, four hundred forty".