40581899 has 4 divisors (see below), whose sum is σ = 40954320. Its totient is φ = 40209480.

The previous prime is 40581887. The next prime is 40581949. The reversal of 40581899 is 99818504.

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 40581899 - 2²⁰ = 39533323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40581869) 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, 186047 + ... + 186264.

It is an arithmetic number, because the mean of its divisors is an integer number (10238580).

Almost surely, 2^40581899 is an apocalyptic number.

40581899 is a deficient number, since it is larger than the sum of its proper divisors (372421).

40581899 is a wasteful number, since it uses less digits than its factorization.

40581899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372420.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 40581899 is about 6370.3923741007. The cubic root of 40581899 is about 343.6456007372.

The spelling of 40581899 in words is "forty million, five hundred eighty-one thousand, eight hundred ninety-nine".