42771904 has 84 divisors (see below), whose sum is σ = 103199184. Its totient is φ = 17504256.

The previous prime is 42771857. The next prime is 42771913. The reversal of 42771904 is 40917724.

It is a self number, because there is not a number n which added to its sum of digits gives 42771904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71832 + ... + 72424.

Almost surely, 2^42771904 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 42771904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51599592).

42771904 is an abundant number, since it is smaller than the sum of its proper divisors (60427280).

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

42771904 is a wasteful number, since it uses less digits than its factorization.

42771904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 625 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 42771904 is about 6540.0232415489. The cubic root of 42771904 is about 349.7192415117.

The spelling of 42771904 in words is "forty-two million, seven hundred seventy-one thousand, nine hundred four".