42440720 has 40 divisors (see below), whose sum is σ = 112772544. Its totient is φ = 14550912.

The previous prime is 42440719. The next prime is 42440743. The reversal of 42440720 is 2704424.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37334 + ... + 38453.

Almost surely, 2^42440720 is an apocalyptic number.

42440720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42440720 is an abundant number, since it is smaller than the sum of its proper divisors (70331824).

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

42440720 is a wasteful number, since it uses less digits than its factorization.

42440720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75807 (or 75801 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 42440720 is about 6514.6542502269. The cubic root of 42440720 is about 348.8142732565.

The spelling of 42440720 in words is "forty-two million, four hundred forty thousand, seven hundred twenty".