40091090 has 32 divisors (see below), whose sum is σ = 79047360. Its totient is φ = 14549184.

The previous prime is 40091069. The next prime is 40091101. The reversal of 40091090 is 9019004.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5057 + ... + 10283.

It is an arithmetic number, because the mean of its divisors is an integer number (2470230).

Almost surely, 2^40091090 is an apocalyptic number.

40091090 is a deficient number, since it is larger than the sum of its proper divisors (38956270).

40091090 is a wasteful number, since it uses less digits than its factorization.

40091090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 40091090 is about 6331.7525220116. The cubic root of 40091090 is about 342.2545953724.

The spelling of 40091090 in words is "forty million, ninety-one thousand, ninety".