40385690 has 32 divisors (see below), whose sum is σ = 76826880. Its totient is φ = 15260224.

The previous prime is 40385689. The next prime is 40385707. The reversal of 40385690 is 9658304.

It is a super-2 number, since 2×40385690² = 3262007913552200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40385690.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12149 + ... + 15111.

It is an arithmetic number, because the mean of its divisors is an integer number (2400840).

Almost surely, 2^40385690 is an apocalyptic number.

40385690 is a deficient number, since it is larger than the sum of its proper divisors (36441190).

40385690 is a wasteful number, since it uses less digits than its factorization.

40385690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 40385690 is about 6354.9736427463. The cubic root of 40385690 is about 343.0908762541.

The spelling of 40385690 in words is "forty million, three hundred eighty-five thousand, six hundred ninety".