42436940 has 72 divisors (see below), whose sum is σ = 111675312. Its totient is φ = 13426560.

The previous prime is 42436939. The next prime is 42436951. The reversal of 42436940 is 4963424.

It is a junction number, because it is equal to n+sod(n) for n = 42436897 and 42436906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11075 + ... + 14405.

It is an arithmetic number, because the mean of its divisors is an integer number (1551046).

Almost surely, 2^42436940 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 42436940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55837656).

42436940 is an abundant number, since it is smaller than the sum of its proper divisors (69238372).

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

42436940 is a wasteful number, since it uses less digits than its factorization.

42436940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3367 (or 3358 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 42436940 is about 6514.3641286007. The cubic root of 42436940 is about 348.8039171873.

The spelling of 42436940 in words is "forty-two million, four hundred thirty-six thousand, nine hundred forty".