40769409 has 16 divisors (see below), whose sum is σ = 56908800. Its totient is φ = 25912656.

The previous prime is 40769401. The next prime is 40769423. The reversal of 40769409 is 90496704.

It is not a de Polignac number, because 40769409 - 2³ = 40769401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40769401) 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, 25372 + ... + 26930.

It is an arithmetic number, because the mean of its divisors is an integer number (3556800).

Almost surely, 2^40769409 is an apocalyptic number.

It is an amenable number.

40769409 is a deficient number, since it is larger than the sum of its proper divisors (16139391).

40769409 is a wasteful number, since it uses less digits than its factorization.

40769409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 40769409 is about 6385.0927166330. The cubic root of 40769409 is about 344.1740629149.

The spelling of 40769409 in words is "forty million, seven hundred sixty-nine thousand, four hundred nine".