44421890 has 8 divisors (see below), whose sum is σ = 79959420. Its totient is φ = 17768752.

The previous prime is 44421869. The next prime is 44421913. The reversal of 44421890 is 9812444.

It can be written as a sum of positive squares in 2 ways, for example, as 43151761 + 1270129 = 6569^2 + 1127^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×44421890² = 3946608622344200, which contains 22 as substring.

It is an unprimeable number.

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, 2221085 + ... + 2221104.

Almost surely, 2^44421890 is an apocalyptic number.

44421890 is a deficient number, since it is larger than the sum of its proper divisors (35537530).

44421890 is a wasteful number, since it uses less digits than its factorization.

44421890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4442196.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 44421890 is about 6664.9748686698. The cubic root of 44421890 is about 354.1595937380.

The spelling of 44421890 in words is "forty-four million, four hundred twenty-one thousand, eight hundred ninety".