40893391 has 12 divisors (see below), whose sum is σ = 51895080. Its totient is φ = 31864560.

The previous prime is 40893389. The next prime is 40893401. The reversal of 40893391 is 19339804.

It is not a de Polignac number, because 40893391 - 2¹ = 40893389 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 40893391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40893341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37396 + ... + 38473.

It is an arithmetic number, because the mean of its divisors is an integer number (4324590).

Almost surely, 2^40893391 is an apocalyptic number.

40893391 is a deficient number, since it is larger than the sum of its proper divisors (11001689).

40893391 is a wasteful number, since it uses less digits than its factorization.

40893391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75894 (or 75887 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 40893391 is about 6394.7940545416. The cubic root of 40893391 is about 344.5225938952.

The spelling of 40893391 in words is "forty million, eight hundred ninety-three thousand, three hundred ninety-one".