42004392 has 16 divisors (see below), whose sum is σ = 105011040. Its totient is φ = 14001456.

The previous prime is 42004387. The next prime is 42004393. The reversal of 42004392 is 29340024.

It is a happy number.

It is a super-3 number, since 3×42004392³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 1750183 = 42004392 / (4 + 2 + 0 + 0 + 4 + 3 + 9 + 2).

It is not an unprimeable number, because it can be changed into a prime (42004393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875068 + ... + 875115.

It is an arithmetic number, because the mean of its divisors is an integer number (6563190).

Almost surely, 2^42004392 is an apocalyptic number.

It is an amenable number.

42004392 is an abundant number, since it is smaller than the sum of its proper divisors (63006648).

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

42004392 is a wasteful number, since it uses less digits than its factorization.

42004392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750192 (or 1750188 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 42004392 is about 6481.0795397063. The cubic root of 42004392 is about 347.6147805021.

The spelling of 42004392 in words is "forty-two million, four thousand, three hundred ninety-two".