42404140 has 12 divisors (see below), whose sum is σ = 89048736. Its totient is φ = 16961648.

The previous prime is 42404113. The next prime is 42404147. The reversal of 42404140 is 4140424.

It is a super-2 number, since 2×42404140² = 3596222178279200, 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 in 3 ways as a sum of consecutive naturals, for example, 1060084 + ... + 1060123.

It is an arithmetic number, because the mean of its divisors is an integer number (7420728).

Almost surely, 2^42404140 is an apocalyptic number.

It is an amenable number.

42404140 is an abundant number, since it is smaller than the sum of its proper divisors (46644596).

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

42404140 is a wasteful number, since it uses less digits than its factorization.

42404140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120216 (or 2120214 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 42404140 is about 6511.8461284032. The cubic root of 42404140 is about 348.7140291690.

Adding to 42404140 its reverse (4140424), we get a palindrome (46544564).

The spelling of 42404140 in words is "forty-two million, four hundred four thousand, one hundred forty".