40021146 has 24 divisors (see below), whose sum is σ = 94595904. Its totient is φ = 12127560.

The previous prime is 40021123. The next prime is 40021147. The reversal of 40021146 is 64112004.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40021147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100866 + ... + 101261.

It is an arithmetic number, because the mean of its divisors is an integer number (3941496).

Almost surely, 2^40021146 is an apocalyptic number.

40021146 is an abundant number, since it is smaller than the sum of its proper divisors (54574758).

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

40021146 is a wasteful number, since it uses less digits than its factorization.

40021146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202146 (or 202143 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 40021146 is about 6326.2268375391. The cubic root of 40021146 is about 342.0554439710.

The spelling of 40021146 in words is "forty million, twenty-one thousand, one hundred forty-six".