40891384 has 8 divisors (see below), whose sum is σ = 76671360. Its totient is φ = 20445688.

The previous prime is 40891379. The next prime is 40891399. The reversal of 40891384 is 48319804.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×40891384³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2555704 + ... + 2555719.

It is an arithmetic number, because the mean of its divisors is an integer number (9583920).

Almost surely, 2^40891384 is an apocalyptic number.

It is an amenable number.

40891384 is a deficient number, since it is larger than the sum of its proper divisors (35779976).

40891384 is a wasteful number, since it uses less digits than its factorization.

40891384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5111429 (or 5111425 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 40891384 is about 6394.6371280941. The cubic root of 40891384 is about 344.5169575471.

The spelling of 40891384 in words is "forty million, eight hundred ninety-one thousand, three hundred eighty-four".