44286640 has 20 divisors (see below), whose sum is σ = 102966624. Its totient is φ = 17714624.

The previous prime is 44286637. The next prime is 44286647. The reversal of 44286640 is 4668244.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×44286640² = 3922612964979200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 44286596 and 44286605.

It is not an unprimeable number, because it can be changed into a prime (44286647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276712 + ... + 276871.

Almost surely, 2^44286640 is an apocalyptic number.

44286640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44286640 is an abundant number, since it is smaller than the sum of its proper divisors (58679984).

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

44286640 is a wasteful number, since it uses less digits than its factorization.

44286640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553596 (or 553590 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 44286640 is about 6654.8208090076. The cubic root of 44286640 is about 353.7997952936.

The spelling of 44286640 in words is "forty-four million, two hundred eighty-six thousand, six hundred forty".