40403091 has 8 divisors (see below), whose sum is σ = 54609040. Its totient is φ = 26566272.

The previous prime is 40403059. The next prime is 40403113. The reversal of 40403091 is 19030404.

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

It is not a de Polignac number, because 40403091 - 2⁵ = 40403059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40403021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92026 + ... + 92463.

It is an arithmetic number, because the mean of its divisors is an integer number (6826130).

Almost surely, 2^40403091 is an apocalyptic number.

40403091 is a deficient number, since it is larger than the sum of its proper divisors (14205949).

40403091 is a wasteful number, since it uses less digits than its factorization.

40403091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184565.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 40403091 is about 6356.3425804467. The cubic root of 40403091 is about 343.1401450842.

Adding to 40403091 its reverse (19030404), we get a palindrome (59433495).

The spelling of 40403091 in words is "forty million, four hundred three thousand, ninety-one".