40889691 has 30 divisors (see below), whose sum is σ = 64693860. Its totient is φ = 25666632.

The previous prime is 40889687. The next prime is 40889707. The reversal of 40889691 is 19698804.

It is not a de Polignac number, because 40889691 - 2² = 40889687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40889621) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 250776 + ... + 250938.

It is an arithmetic number, because the mean of its divisors is an integer number (2156462).

Almost surely, 2^40889691 is an apocalyptic number.

40889691 is a deficient number, since it is larger than the sum of its proper divisors (23804169).

40889691 is an equidigital number, since it uses as much as digits as its factorization.

40889691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 40889691 is about 6394.5047501742. The cubic root of 40889691 is about 344.5122028759.

The spelling of 40889691 in words is "forty million, eight hundred eighty-nine thousand, six hundred ninety-one".