40864791 has 8 divisors (see below), whose sum is σ = 59439744. Its totient is φ = 24766520.

The previous prime is 40864783. The next prime is 40864793. The reversal of 40864791 is 19746804.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40864791 - 2³ = 40864783 is a prime.

It is a super-2 number, since 2×40864791² = 3339862286947362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40864793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619131 + ... + 619196.

It is an arithmetic number, because the mean of its divisors is an integer number (7429968).

Almost surely, 2^40864791 is an apocalyptic number.

40864791 is a deficient number, since it is larger than the sum of its proper divisors (18574953).

40864791 is a wasteful number, since it uses less digits than its factorization.

40864791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238341.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 40864791 is about 6392.5574694327. The cubic root of 40864791 is about 344.4422578155.

The spelling of 40864791 in words is "forty million, eight hundred sixty-four thousand, seven hundred ninety-one".