40106891 has 8 divisors (see below), whose sum is σ = 46056000. Its totient is φ = 34541640.

The previous prime is 40106879. The next prime is 40106903. The reversal of 40106891 is 19860104.

It is an interprime number because it is at equal distance from previous prime (40106879) and next prime (40106903).

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

It is a cyclic number.

It is not a de Polignac number, because 40106891 - 2¹⁴ = 40090507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40106291) 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, 95741 + ... + 96158.

It is an arithmetic number, because the mean of its divisors is an integer number (5757000).

Almost surely, 2^40106891 is an apocalyptic number.

40106891 is a deficient number, since it is larger than the sum of its proper divisors (5949109).

40106891 is a wasteful number, since it uses less digits than its factorization.

40106891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191929.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 40106891 is about 6333.0001579030. Note that the first 3 decimals coincide. The cubic root of 40106891 is about 342.2995534461.

Adding to 40106891 its reverse (19860104), we get a palindrome (59966995).

It can be divided in two parts, 4010 and 6891, that added together give a palindrome (10901).

The spelling of 40106891 in words is "forty million, one hundred six thousand, eight hundred ninety-one".