40055791 has 8 divisors (see below), whose sum is σ = 42469920. Its totient is φ = 37648128.

The previous prime is 40055789. The next prime is 40055809. The reversal of 40055791 is 19755004.

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 40055791 - 2¹ = 40055789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40055731) 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, 18150 + ... + 20236.

It is an arithmetic number, because the mean of its divisors is an integer number (5308740).

Almost surely, 2^40055791 is an apocalyptic number.

40055791 is a deficient number, since it is larger than the sum of its proper divisors (2414129).

40055791 is a wasteful number, since it uses less digits than its factorization.

40055791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 40055791 is about 6328.9644492602. The cubic root of 40055791 is about 342.1541175819.

The spelling of 40055791 in words is "forty million, fifty-five thousand, seven hundred ninety-one".