40628091 has 8 divisors (see below), whose sum is σ = 61909504. Its totient is φ = 23216040.

The previous prime is 40628087. The next prime is 40628129. The reversal of 40628091 is 19082604.

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

It is not a de Polignac number, because 40628091 - 2² = 40628087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40628191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 967315 + ... + 967356.

It is an arithmetic number, because the mean of its divisors is an integer number (7738688).

Almost surely, 2^40628091 is an apocalyptic number.

40628091 is a deficient number, since it is larger than the sum of its proper divisors (21281413).

40628091 is a wasteful number, since it uses less digits than its factorization.

40628091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934681.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 40628091 is about 6374.0168653683. The cubic root of 40628091 is about 343.7759351892.

The spelling of 40628091 in words is "forty million, six hundred twenty-eight thousand, ninety-one".