440613990 has 192 divisors, whose sum is σ = 1334361600. Its totient is φ = 100058112.

The previous prime is 440613989. The next prime is 440614051. The reversal of 440613990 is 99316044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 668281 + ... + 668939.

It is an arithmetic number, because the mean of its divisors is an integer number (6949800).

Almost surely, 2^440613990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 440613990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667180800).

440613990 is an abundant number, since it is smaller than the sum of its proper divisors (893747610).

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

440613990 is a wasteful number, since it uses less digits than its factorization.

440613990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 440613990 is about 20990.8072736615. The cubic root of 440613990 is about 760.9441117770.

The spelling of 440613990 in words is "four hundred forty million, six hundred thirteen thousand, nine hundred ninety".