44421645 has 16 divisors (see below), whose sum is σ = 72996480. Its totient is φ = 23050944.

The previous prime is 44421617. The next prime is 44421653. The reversal of 44421645 is 54612444.

44421645 = T₃₄₁ + T₃₄₂ + ... + T₆₇₃.

It is a happy number.

It is not a de Polignac number, because 44421645 - 2⁵ = 44421613 is a prime.

It is a super-3 number, since 3×44421645³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39465 + ... + 40574.

It is an arithmetic number, because the mean of its divisors is an integer number (4562280).

Almost surely, 2^44421645 is an apocalyptic number.

It is an amenable number.

44421645 is a deficient number, since it is larger than the sum of its proper divisors (28574835).

44421645 is a wasteful number, since it uses less digits than its factorization.

44421645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80084.

The product of its digits is 15360, while the sum is 30.

The square root of 44421645 is about 6664.9564889803. The cubic root of 44421645 is about 354.1589426382.

The spelling of 44421645 in words is "forty-four million, four hundred twenty-one thousand, six hundred forty-five".