42840036 has 24 divisors (see below), whose sum is σ = 111067040. Its totient is φ = 14279976.

The previous prime is 42839999. The next prime is 42840067. The reversal of 42840036 is 63004824.

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

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 42839991 and 42840009.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198226 + ... + 198441.

Almost surely, 2^42840036 is an apocalyptic number.

It is an amenable number.

42840036 is an abundant number, since it is smaller than the sum of its proper divisors (68227004).

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

42840036 is a wasteful number, since it uses less digits than its factorization.

42840036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396680 (or 396672 counting only the distinct ones).

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

The square root of 42840036 is about 6545.2300188763. The cubic root of 42840036 is about 349.9048339904.

The spelling of 42840036 in words is "forty-two million, eight hundred forty thousand, thirty-six".