42740864 has 32 divisors (see below), whose sum is σ = 86365440. Its totient is φ = 21064960.

The previous prime is 42740851. The next prime is 42740879. The reversal of 42740864 is 46804724.

It is a tau number, because it is divible by the number of its divisors (32).

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, 6737 + ... + 11439.

It is an arithmetic number, because the mean of its divisors is an integer number (2698920).

Almost surely, 2^42740864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42740864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43182720).

42740864 is an abundant number, since it is smaller than the sum of its proper divisors (43624576).

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

42740864 is an equidigital number, since it uses as much as digits as its factorization.

42740864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788 (or 4776 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 42740864 is about 6537.6497305989. The cubic root of 42740864 is about 349.6346227843.

The spelling of 42740864 in words is "forty-two million, seven hundred forty thousand, eight hundred sixty-four".