40206869 has 16 divisors (see below), whose sum is σ = 43538880. Its totient is φ = 37013760.

The previous prime is 40206863. The next prime is 40206871. The reversal of 40206869 is 96860204.

It is a cyclic number.

It is not a de Polignac number, because 40206869 - 2⁸ = 40206613 is a prime.

It is a super-2 number, since 2×40206869² = 3233184629566322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40206863) 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, 130814 + ... + 131120.

It is an arithmetic number, because the mean of its divisors is an integer number (2721180).

Almost surely, 2^40206869 is an apocalyptic number.

It is an amenable number.

40206869 is a deficient number, since it is larger than the sum of its proper divisors (3332011).

40206869 is a wasteful number, since it uses less digits than its factorization.

40206869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 40206869 is about 6340.8886601170. Note that the first 3 decimals coincide. The cubic root of 40206869 is about 342.5837442406.

The spelling of 40206869 in words is "forty million, two hundred six thousand, eight hundred sixty-nine".