40228591 has 6 divisors (see below), whose sum is σ = 43561320. Its totient is φ = 37133928.

The previous prime is 40228577. The next prime is 40228631. The reversal of 40228591 is 19582204.

It is a de Polignac number, because none of the positive numbers 2^k-40228591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40228571) 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 5 ways as a sum of consecutive naturals, for example, 118851 + ... + 119188.

It is an arithmetic number, because the mean of its divisors is an integer number (7260220).

Almost surely, 2^40228591 is an apocalyptic number.

40228591 is a deficient number, since it is larger than the sum of its proper divisors (3332729).

40228591 is a wasteful number, since it uses less digits than its factorization.

40228591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238065 (or 238052 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 40228591 is about 6342.6012802320. The cubic root of 40228591 is about 342.6454274351.

The spelling of 40228591 in words is "forty million, two hundred twenty-eight thousand, five hundred ninety-one".