40090849 has 4 divisors (see below), whose sum is σ = 40137136. Its totient is φ = 40044564.

The previous prime is 40090837. The next prime is 40090871. The reversal of 40090849 is 94809004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40090849 - 2¹³ = 40082657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40090819) 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, 21819 + ... + 23584.

It is an arithmetic number, because the mean of its divisors is an integer number (10034284).

Almost surely, 2^40090849 is an apocalyptic number.

It is an amenable number.

40090849 is a deficient number, since it is larger than the sum of its proper divisors (46287).

40090849 is an equidigital number, since it uses as much as digits as its factorization.

40090849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46286.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 40090849 is about 6331.7334909170. The cubic root of 40090849 is about 342.2539095714.

The spelling of 40090849 in words is "forty million, ninety thousand, eight hundred forty-nine".