42978936 has 128 divisors (see below), whose sum is σ = 144345600. Its totient is φ = 10298880.

The previous prime is 42978917. The next prime is 42978961. The reversal of 42978936 is 63987924.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23130 + ... + 24918.

It is an arithmetic number, because the mean of its divisors is an integer number (1127700).

Almost surely, 2^42978936 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 42978936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72172800).

42978936 is an abundant number, since it is smaller than the sum of its proper divisors (101366664).

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

42978936 is a wasteful number, since it uses less digits than its factorization.

42978936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829 (or 1825 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The square root of 42978936 is about 6555.8322126180. The cubic root of 42978936 is about 350.2825908217.

The spelling of 42978936 in words is "forty-two million, nine hundred seventy-eight thousand, nine hundred thirty-six".