40402111 has 4 divisors (see below), whose sum is σ = 40457232. Its totient is φ = 40346992.

The previous prime is 40402091. The next prime is 40402123. The reversal of 40402111 is 11120404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40402111 - 2¹³ = 40393919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40402091 and 40402100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40432111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26446 + ... + 27931.

It is an arithmetic number, because the mean of its divisors is an integer number (10114308).

Almost surely, 2^40402111 is an apocalyptic number.

40402111 is a deficient number, since it is larger than the sum of its proper divisors (55121).

40402111 is an equidigital number, since it uses as much as digits as its factorization.

40402111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55120.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 40402111 is about 6356.2654916232. The cubic root of 40402111 is about 343.1373707085.

Adding to 40402111 its reverse (11120404), we get a palindrome (51522515).

The spelling of 40402111 in words is "forty million, four hundred two thousand, one hundred eleven".