40407091 has 12 divisors (see below), whose sum is σ = 42958512. Its totient is φ = 38000304.

The previous prime is 40407089. The next prime is 40407119. The reversal of 40407091 is 19070404.

It is not a de Polignac number, because 40407091 - 2¹ = 40407089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40407001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62130 + ... + 62776.

It is an arithmetic number, because the mean of its divisors is an integer number (3579876).

Almost surely, 2^40407091 is an apocalyptic number.

40407091 is a deficient number, since it is larger than the sum of its proper divisors (2551421).

40407091 is a wasteful number, since it uses less digits than its factorization.

40407091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 40407091 is about 6356.6572190106. The cubic root of 40407091 is about 343.1514686014.

Adding to 40407091 its reverse (19070404), we get a palindrome (59477495).

The spelling of 40407091 in words is "forty million, four hundred seven thousand, ninety-one".