40185699 has 16 divisors (see below), whose sum is σ = 55157760. Its totient is φ = 26008640.

The previous prime is 40185689. The next prime is 40185701. The reversal of 40185699 is 99658104.

It is a cyclic number.

It is not a de Polignac number, because 40185699 - 2²⁰ = 39137123 is a prime.

It is a super-2 number, since 2×40185699² = 3229780808237202, 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 40185699.

It is not an unprimeable number, because it can be changed into a prime (40185659) 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, 28714 + ... + 30080.

It is an arithmetic number, because the mean of its divisors is an integer number (3447360).

Almost surely, 2^40185699 is an apocalyptic number.

40185699 is a deficient number, since it is larger than the sum of its proper divisors (14972061).

40185699 is a wasteful number, since it uses less digits than its factorization.

40185699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 40185699 is about 6339.2191159480. The cubic root of 40185699 is about 342.5236071604.

The spelling of 40185699 in words is "forty million, one hundred eighty-five thousand, six hundred ninety-nine".