44399880 has 192 divisors, whose sum is σ = 172368000. Its totient is φ = 10136448.

The previous prime is 44399863. The next prime is 44399891. The reversal of 44399880 is 8899344.

44399880 = 700² + 701² + ... + 780².

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52501 + ... + 53339.

It is an arithmetic number, because the mean of its divisors is an integer number (897750).

Almost surely, 2^44399880 is an apocalyptic number.

44399880 is a gapful number since it is divisible by the number (40) 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 44399880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86184000).

44399880 is an abundant number, since it is smaller than the sum of its proper divisors (127968120).

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

44399880 is a wasteful number, since it uses less digits than its factorization.

44399880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 44399880 is about 6663.3234950736. The cubic root of 44399880 is about 354.1010914963.

The spelling of 44399880 in words is "forty-four million, three hundred ninety-nine thousand, eight hundred eighty".