40071969 has 32 divisors (see below), whose sum is σ = 71424000. Its totient is φ = 21691152.

The previous prime is 40071959. The next prime is 40071973. The reversal of 40071969 is 96917004.

It is not a de Polignac number, because 40071969 - 2⁴ = 40071953 is a prime.

It is a super-2 number, since 2×40071969² = 3211525399073922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40071919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1989 + ... + 9170.

It is an arithmetic number, because the mean of its divisors is an integer number (2232000).

Almost surely, 2^40071969 is an apocalyptic number.

It is an amenable number.

40071969 is a deficient number, since it is larger than the sum of its proper divisors (31352031).

40071969 is a wasteful number, since it uses less digits than its factorization.

40071969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11194 (or 11188 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 40071969 is about 6330.2424124199. The cubic root of 40071969 is about 342.2001752107.

The spelling of 40071969 in words is "forty million, seventy-one thousand, nine hundred sixty-nine".