42240408 has 32 divisors (see below), whose sum is σ = 120687360. Its totient is φ = 12068640.

The previous prime is 42240391. The next prime is 42240409. The reversal of 42240408 is 80404224.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42240409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125548 + ... + 125883.

It is an arithmetic number, because the mean of its divisors is an integer number (3771480).

Almost surely, 2^42240408 is an apocalyptic number.

It is an amenable number.

42240408 is an abundant number, since it is smaller than the sum of its proper divisors (78446952).

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

42240408 is a wasteful number, since it uses less digits than its factorization.

42240408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251447 (or 251443 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 42240408 is about 6499.2621119632. The cubic root of 42240408 is about 348.2646289463.

The spelling of 42240408 in words is "forty-two million, two hundred forty thousand, four hundred eight".