40402069 has 16 divisors (see below), whose sum is σ = 42796864. Its totient is φ = 38102400.

The previous prime is 40402067. The next prime is 40402091. The reversal of 40402069 is 96020404.

40402069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 40402069 - 2¹ = 40402067 is a prime.

It is a super-2 number, since 2×40402069² = 3264654358961522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40402067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191374 + ... + 191584.

It is an arithmetic number, because the mean of its divisors is an integer number (2674804).

Almost surely, 2^40402069 is an apocalyptic number.

It is an amenable number.

40402069 is a deficient number, since it is larger than the sum of its proper divisors (2394795).

40402069 is a wasteful number, since it uses less digits than its factorization.

40402069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 40402069 is about 6356.2621877956. The cubic root of 40402069 is about 343.1372518057.

The spelling of 40402069 in words is "forty million, four hundred two thousand, sixty-nine".