42920442 has 40 divisors (see below), whose sum is σ = 96598656. Its totient is φ = 14243688.

The previous prime is 42920431. The next prime is 42920443. The reversal of 42920442 is 24402924.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (42920443) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49303 + ... + 50165.

Almost surely, 2^42920442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42920442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48299328).

42920442 is an abundant number, since it is smaller than the sum of its proper divisors (53678214).

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

42920442 is a wasteful number, since it uses less digits than its factorization.

42920442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184 (or 1175 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 42920442 is about 6551.3694751556. The cubic root of 42920442 is about 350.1236080414.

The spelling of 42920442 in words is "forty-two million, nine hundred twenty thousand, four hundred forty-two".