40021366 has 32 divisors (see below), whose sum is σ = 79252992. Its totient is φ = 14674560.

The previous prime is 40021361. The next prime is 40021369. The reversal of 40021366 is 66312004.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40021361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5026 + ... + 10261.

It is an arithmetic number, because the mean of its divisors is an integer number (2476656).

Almost surely, 2^40021366 is an apocalyptic number.

40021366 is a deficient number, since it is larger than the sum of its proper divisors (39231626).

40021366 is a wasteful number, since it uses less digits than its factorization.

40021366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15324.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 40021366 is about 6326.2442254469. The cubic root of 40021366 is about 342.0560707402.

The spelling of 40021366 in words is "forty million, twenty-one thousand, three hundred sixty-six".