42861924 has 72 divisors (see below), whose sum is σ = 125448960. Its totient is φ = 12085632.

The previous prime is 42861911. The next prime is 42861941. The reversal of 42861924 is 42916824.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18832 + ... + 20984.

Almost surely, 2^42861924 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 42861924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62724480).

42861924 is an abundant number, since it is smaller than the sum of its proper divisors (82587036).

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

42861924 is a wasteful number, since it uses less digits than its factorization.

42861924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249 (or 2244 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 42861924 is about 6546.9018627134. The cubic root of 42861924 is about 349.9644154299.

The spelling of 42861924 in words is "forty-two million, eight hundred sixty-one thousand, nine hundred twenty-four".