42957816 has 128 divisors (see below), whose sum is σ = 125798400. Its totient is φ = 12096000.

The previous prime is 42957809. The next prime is 42957821. The reversal of 42957816 is 61875924.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237246 + ... + 237426.

It is an arithmetic number, because the mean of its divisors is an integer number (982800).

Almost surely, 2^42957816 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 42957816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62899200).

42957816 is an abundant number, since it is smaller than the sum of its proper divisors (82840584).

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

42957816 is a wasteful number, since it uses less digits than its factorization.

42957816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 257 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 42957816 is about 6554.2212352041. The cubic root of 42957816 is about 350.2252047226.

The spelling of 42957816 in words is "forty-two million, nine hundred fifty-seven thousand, eight hundred sixteen".