40528891 has 8 divisors (see below), whose sum is σ = 43704864. Its totient is φ = 37361280.

The previous prime is 40528861. The next prime is 40528897. The reversal of 40528891 is 19882504.

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 40528891 - 2¹⁹ = 40004603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40528891.

It is not an unprimeable number, because it can be changed into a prime (40528897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11106 + ... + 14296.

It is an arithmetic number, because the mean of its divisors is an integer number (5463108).

Almost surely, 2^40528891 is an apocalyptic number.

40528891 is a deficient number, since it is larger than the sum of its proper divisors (3175973).

40528891 is a wasteful number, since it uses less digits than its factorization.

40528891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 40528891 is about 6366.2305173470. The cubic root of 40528891 is about 343.4959124654.

The spelling of 40528891 in words is "forty million, five hundred twenty-eight thousand, eight hundred ninety-one".