40191853 has 8 divisors (see below), whose sum is σ = 43731128. Its totient is φ = 36716544.

The previous prime is 40191847. The next prime is 40191857. The reversal of 40191853 is 35819104.

It can be written as a sum of positive squares in 4 ways, for example, as 21609 + 40170244 = 147^2 + 6338^2 .

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 40191853 - 2¹⁷ = 40060781 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 (40191857) 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, 14676 + ... + 17197.

It is an arithmetic number, because the mean of its divisors is an integer number (5466391).

Almost surely, 2^40191853 is an apocalyptic number.

It is an amenable number.

40191853 is a deficient number, since it is larger than the sum of its proper divisors (3539275).

40191853 is a wasteful number, since it uses less digits than its factorization.

40191853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31983.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 40191853 is about 6339.7044883811. The cubic root of 40191853 is about 342.5410908485.

The spelling of 40191853 in words is "forty million, one hundred ninety-one thousand, eight hundred fifty-three".