44947840 has 128 divisors (see below), whose sum is σ = 125337600. Its totient is φ = 15095808.

The previous prime is 44947801. The next prime is 44947841. The reversal of 44947840 is 4874944.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 44947793 and 44947802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44947841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353857 + ... + 353983.

It is an arithmetic number, because the mean of its divisors is an integer number (979200).

Almost surely, 2^44947840 is an apocalyptic number.

44947840 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 44947840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62668800).

44947840 is an abundant number, since it is smaller than the sum of its proper divisors (80389760).

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

44947840 is a wasteful number, since it uses less digits than its factorization.

44947840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 44947840 is about 6704.3150283978. The cubic root of 44947840 is about 355.5518494984.

The spelling of 44947840 in words is "forty-four million, nine hundred forty-seven thousand, eight hundred forty".