40266891 has 12 divisors (see below), whose sum is σ = 66472432. Its totient is φ = 23009616.

The previous prime is 40266883. The next prime is 40266899. The reversal of 40266891 is 19866204.

40266891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40266883) and next prime (40266899).

It is not a de Polignac number, because 40266891 - 2³ = 40266883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40266899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319516 + ... + 319641.

Almost surely, 2^40266891 is an apocalyptic number.

40266891 is a deficient number, since it is larger than the sum of its proper divisors (26205541).

40266891 is a wasteful number, since it uses less digits than its factorization.

40266891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639170 (or 639167 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 40266891 is about 6345.6198278813. The cubic root of 40266891 is about 342.7541325212.

The spelling of 40266891 in words is "forty million, two hundred sixty-six thousand, eight hundred ninety-one".