74668440 has 128 divisors (see below), whose sum is σ = 279313920. Its totient is φ = 15513600.

The previous prime is 74668439. The next prime is 74668441. The reversal of 74668440 is 4486647.

It is an interprime number because it is at equal distance from previous prime (74668439) and next prime (74668441).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74668441) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 5200 + ... + 13280.

It is an arithmetic number, because the mean of its divisors is an integer number (2182140).

Almost surely, 2^74668440 is an apocalyptic number.

74668440 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 74668440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139656960).

74668440 is an abundant number, since it is smaller than the sum of its proper divisors (204645480).

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

74668440 is a wasteful number, since it uses less digits than its factorization.

74668440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8113 (or 8109 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 74668440 is about 8641.0902089956. The cubic root of 74668440 is about 421.0939734516.

The spelling of 74668440 in words is "seventy-four million, six hundred sixty-eight thousand, four hundred forty".