40919391 has 32 divisors (see below), whose sum is σ = 65318400. Its totient is φ = 25223040.

The previous prime is 40919383. The next prime is 40919401. The reversal of 40919391 is 19391904.

40919391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40919391 - 2³ = 40919383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40919321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26326 + ... + 27836.

It is an arithmetic number, because the mean of its divisors is an integer number (2041200).

Almost surely, 2^40919391 is an apocalyptic number.

40919391 is a deficient number, since it is larger than the sum of its proper divisors (24399009).

40919391 is a wasteful number, since it uses less digits than its factorization.

40919391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596 (or 1590 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 40919391 is about 6396.8266351371. The cubic root of 40919391 is about 344.5955941974.

The spelling of 40919391 in words is "forty million, nine hundred nineteen thousand, three hundred ninety-one".