44397990 has 192 divisors, whose sum is σ = 147571200. Its totient is φ = 9300096.

The previous prime is 44397979. The next prime is 44398009. The reversal of 44397990 is 9979344.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 319341 + ... + 319479.

It is an arithmetic number, because the mean of its divisors is an integer number (768600).

Almost surely, 2^44397990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44397990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73785600).

44397990 is an abundant number, since it is smaller than the sum of its proper divisors (103173210).

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

44397990 is a wasteful number, since it uses less digits than its factorization.

44397990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 44397990 is about 6663.1816724445. The cubic root of 44397990 is about 354.0960670041.

The spelling of 44397990 in words is "forty-four million, three hundred ninety-seven thousand, nine hundred ninety".