40540799 has 4 divisors (see below), whose sum is σ = 43659336. Its totient is φ = 37422264.

The previous prime is 40540781. The next prime is 40540807. The reversal of 40540799 is 99704504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40540799 - 2⁸ = 40540543 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 (40540739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1559249 + ... + 1559274.

It is an arithmetic number, because the mean of its divisors is an integer number (10914834).

Almost surely, 2^40540799 is an apocalyptic number.

40540799 is a deficient number, since it is larger than the sum of its proper divisors (3118537).

40540799 is a wasteful number, since it uses less digits than its factorization.

40540799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3118536.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 40540799 is about 6367.1656959749. The cubic root of 40540799 is about 343.5295505993.

The spelling of 40540799 in words is "forty million, five hundred forty thousand, seven hundred ninety-nine".