42755840 has 36 divisors (see below), whose sum is σ = 102416664. Its totient is φ = 17101824.

The previous prime is 42755837. The next prime is 42755857. The reversal of 42755840 is 4855724.

It is a self number, because there is not a number n which added to its sum of digits gives 42755840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15422 + ... + 17981.

Almost surely, 2^42755840 is an apocalyptic number.

42755840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42755840 is an abundant number, since it is smaller than the sum of its proper divisors (59660824).

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

42755840 is an equidigital number, since it uses as much as digits as its factorization.

42755840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33424 (or 33410 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 42755840 is about 6538.7949960218. The cubic root of 42755840 is about 349.6754542524.

The spelling of 42755840 in words is "forty-two million, seven hundred fifty-five thousand, eight hundred forty".