42404144 has 10 divisors (see below), whose sum is σ = 82158060. Its totient is φ = 21202064.

The previous prime is 42404113. The next prime is 42404147. The reversal of 42404144 is 44140424.

It is a super-2 number, since 2×42404144² = 3596222856745472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42404147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325114 + ... + 1325145.

It is an arithmetic number, because the mean of its divisors is an integer number (8215806).

Almost surely, 2^42404144 is an apocalyptic number.

It is an amenable number.

42404144 is a deficient number, since it is larger than the sum of its proper divisors (39753916).

42404144 is a wasteful number, since it uses less digits than its factorization.

42404144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650267 (or 2650261 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 42404144 is about 6511.8464355358. The cubic root of 42404144 is about 348.7140401338.

Adding to 42404144 its reverse (44140424), we get a palindrome (86544568).

The spelling of 42404144 in words is "forty-two million, four hundred four thousand, one hundred forty-four".