40011897 has 8 divisors (see below), whose sum is σ = 56487456. Its totient is φ = 25105472.

The previous prime is 40011889. The next prime is 40011943. The reversal of 40011897 is 79811004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40011897 - 2³ = 40011889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40011827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392223 + ... + 392324.

It is an arithmetic number, because the mean of its divisors is an integer number (7060932).

Almost surely, 2^40011897 is an apocalyptic number.

It is an amenable number.

40011897 is a deficient number, since it is larger than the sum of its proper divisors (16475559).

40011897 is a wasteful number, since it uses less digits than its factorization.

40011897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784567.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 40011897 is about 6325.4957908452. The cubic root of 40011897 is about 342.0290919475.

The spelling of 40011897 in words is "forty million, eleven thousand, eight hundred ninety-seven".