40088805 has 16 divisors (see below), whose sum is σ = 67915584. Its totient is φ = 20122880.

The previous prime is 40088777. The next prime is 40088809. The reversal of 40088805 is 50888004.

It is not a de Polignac number, because 40088805 - 2¹⁷ = 39957733 is a prime.

It is a super-2 number, since 2×40088805² = 3214224572656050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40088809) 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, 78351 + ... + 78860.

It is an arithmetic number, because the mean of its divisors is an integer number (4244724).

Almost surely, 2^40088805 is an apocalyptic number.

It is an amenable number.

40088805 is a deficient number, since it is larger than the sum of its proper divisors (27826779).

40088805 is a wasteful number, since it uses less digits than its factorization.

40088805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157236.

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 40088805 is about 6331.5720796655. The cubic root of 40088805 is about 342.2480929583.

The spelling of 40088805 in words is "forty million, eighty-eight thousand, eight hundred five".