42865440 has 48 divisors (see below), whose sum is σ = 135027648. Its totient is φ = 11430656.

The previous prime is 42865439. The next prime is 42865507. The reversal of 42865440 is 4456824.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 44172 + ... + 45131.

It is an arithmetic number, because the mean of its divisors is an integer number (2813076).

Almost surely, 2^42865440 is an apocalyptic number.

42865440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42865440 is an abundant number, since it is smaller than the sum of its proper divisors (92162208).

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

42865440 is a wasteful number, since it uses less digits than its factorization.

42865440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89321 (or 89313 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 42865440 is about 6547.1703811647. The cubic root of 42865440 is about 349.9739844609.

The spelling of 42865440 in words is "forty-two million, eight hundred sixty-five thousand, four hundred forty".