19440044 has 24 divisors (see below), whose sum is σ = 38793888. Its totient is φ = 8444160.

The previous prime is 19440023. The next prime is 19440067. The reversal of 19440044 is 44004491.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 19439995 and 19440022.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10112 + ... + 11879.

It is an arithmetic number, because the mean of its divisors is an integer number (1616412).

Almost surely, 2^19440044 is an apocalyptic number.

It is an amenable number.

19440044 is a deficient number, since it is larger than the sum of its proper divisors (19353844).

19440044 is a wasteful number, since it uses less digits than its factorization.

19440044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22025 (or 22023 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 19440044 is about 4409.0865267082. The cubic root of 19440044 is about 268.8844876552.

The spelling of 19440044 in words is "nineteen million, four hundred forty thousand, forty-four".