74440890 has 64 divisors (see below), whose sum is σ = 201916800. Its totient is φ = 19510272.

The previous prime is 74440867. The next prime is 74440901. The reversal of 74440890 is 9804447.

It is a super-2 number, since 2×74440890² = 11082892207984200, which contains 22 as substring.

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, 13594 + ... + 18266.

It is an arithmetic number, because the mean of its divisors is an integer number (3154950).

Almost surely, 2^74440890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74440890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100958400).

74440890 is an abundant number, since it is smaller than the sum of its proper divisors (127475910).

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

74440890 is a wasteful number, since it uses less digits than its factorization.

74440890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4748 (or 4742 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 74440890 is about 8627.9134209842. The cubic root of 74440890 is about 420.6657807864.

The spelling of 74440890 in words is "seventy-four million, four hundred forty thousand, eight hundred ninety".