42943992 has 144 divisors (see below), whose sum is σ = 137080440. Its totient is φ = 11112192.

The previous prime is 42943981. The next prime is 42943993. The reversal of 42943992 is 29934924.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42943993) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 810238 + ... + 810290.

Almost surely, 2^42943992 is an apocalyptic number.

42943992 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42943992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68540220).

42943992 is an abundant number, since it is smaller than the sum of its proper divisors (94136448).

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

42943992 is a wasteful number, since it uses less digits than its factorization.

42943992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 78 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 42943992 is about 6553.1665628153. The cubic root of 42943992 is about 350.1876327267.

The spelling of 42943992 in words is "forty-two million, nine hundred forty-three thousand, nine hundred ninety-two".