42878844 has 18 divisors (see below), whose sum is σ = 108388280. Its totient is φ = 14292936.

The previous prime is 42878837. The next prime is 42878851. The reversal of 42878844 is 44887824.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42878837) and next prime (42878851).

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 42878844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 595504 + ... + 595575.

Almost surely, 2^42878844 is an apocalyptic number.

It is an amenable number.

42878844 is an abundant number, since it is smaller than the sum of its proper divisors (65509436).

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

42878844 is a wasteful number, since it uses less digits than its factorization.

42878844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191089 (or 1191084 counting only the distinct ones).

The product of its digits is 458752, while the sum is 45.

The square root of 42878844 is about 6548.1939494795. The cubic root of 42878844 is about 350.0104595514.

It can be divided in two parts, 4287 and 8844, that added together give a palindrome (13131).

The spelling of 42878844 in words is "forty-two million, eight hundred seventy-eight thousand, eight hundred forty-four".