19440042 has 32 divisors (see below), whose sum is σ = 40128000. Its totient is φ = 6274800.

The previous prime is 19440023. The next prime is 19440067. The reversal of 19440042 is 24004491.

It is a junction number, because it is equal to n+sod(n) for n = 19439994 and 19440021.

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, 38709 + ... + 39207.

It is an arithmetic number, because the mean of its divisors is an integer number (1254000).

Almost surely, 2^19440042 is an apocalyptic number.

19440042 is an abundant number, since it is smaller than the sum of its proper divisors (20687958).

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

19440042 is a wasteful number, since it uses less digits than its factorization.

19440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 19440042 is about 4409.0862999039. The cubic root of 19440042 is about 268.8844784342.

The spelling of 19440042 in words is "nineteen million, four hundred forty thousand, forty-two".