42878305820440 has 64 divisors (see below), whose sum is σ = 97240738140000. Its totient is φ = 17015854648320.

The previous prime is 42878305820353. The next prime is 42878305820447. The reversal of 42878305820440 is 4402850387824.

It is a happy number.

It is a super-2 number, since 2×42878305820440² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42878305820447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4033765 + ... + 10100884.

Almost surely, 2^{42878305820440} is an apocalyptic number.

42878305820440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42878305820440 is an abundant number, since it is smaller than the sum of its proper divisors (54362432319560).

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

42878305820440 is a wasteful number, since it uses less digits than its factorization.

42878305820440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14135260 (or 14135256 counting only the distinct ones).

The product of its (nonzero) digits is 13762560, while the sum is 55.

The spelling of 42878305820440 in words is "forty-two trillion, eight hundred seventy-eight billion, three hundred five million, eight hundred twenty thousand, four hundred forty".