40085420 has 12 divisors (see below), whose sum is σ = 84179424. Its totient is φ = 16034160.

The previous prime is 40085411. The next prime is 40085429. The reversal of 40085420 is 2458004.

It is an interprime number because it is at equal distance from previous prime (40085411) and next prime (40085429).

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40085429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002116 + ... + 1002155.

It is an arithmetic number, because the mean of its divisors is an integer number (7014952).

Almost surely, 2^40085420 is an apocalyptic number.

It is an amenable number.

40085420 is an abundant number, since it is smaller than the sum of its proper divisors (44094004).

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

40085420 is a wasteful number, since it uses less digits than its factorization.

40085420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004280 (or 2004278 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 40085420 is about 6331.3047628431. The cubic root of 40085420 is about 342.2384598250.

The spelling of 40085420 in words is "forty million, eighty-five thousand, four hundred twenty".