40402785 has 16 divisors (see below), whose sum is σ = 64725120. Its totient is φ = 21521280.

The previous prime is 40402783. The next prime is 40402793. The reversal of 40402785 is 58720404.

It is not a de Polignac number, because 40402785 - 2¹ = 40402783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40402783) 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, 18796 + ... + 20834.

It is an arithmetic number, because the mean of its divisors is an integer number (4045320).

Almost surely, 2^40402785 is an apocalyptic number.

It is an amenable number.

40402785 is a deficient number, since it is larger than the sum of its proper divisors (24322335).

40402785 is a wasteful number, since it uses less digits than its factorization.

40402785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 40402785 is about 6356.3185099553. The cubic root of 40402785 is about 343.1392788043.

The spelling of 40402785 in words is "forty million, four hundred two thousand, seven hundred eighty-five".