42791436 has 24 divisors (see below), whose sum is σ = 110941040. Its totient is φ = 14263776.

The previous prime is 42791429. The next prime is 42791447. The reversal of 42791436 is 63419724.

It is a super-2 number, since 2×42791436² = 3662213989884192, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 42791436.

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 7 ways as a sum of consecutive naturals, for example, 198001 + ... + 198216.

Almost surely, 2^42791436 is an apocalyptic number.

It is an amenable number.

42791436 is an abundant number, since it is smaller than the sum of its proper divisors (68149604).

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

42791436 is a wasteful number, since it uses less digits than its factorization.

42791436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396230 (or 396222 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 42791436 is about 6541.5163379755. The cubic root of 42791436 is about 349.7724670802.

The spelling of 42791436 in words is "forty-two million, seven hundred ninety-one thousand, four hundred thirty-six".