40809253 has 8 divisors (see below), whose sum is σ = 41185496. Its totient is φ = 40435200.

The previous prime is 40809239. The next prime is 40809257. The reversal of 40809253 is 35290804.

It can be written as a sum of positive squares in 4 ways, for example, as 588289 + 40220964 = 767^2 + 6342^2 .

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 40809253 - 2⁵ = 40809221 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 (40809257) 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, 75163 + ... + 75703.

It is an arithmetic number, because the mean of its divisors is an integer number (5148187).

Almost surely, 2^40809253 is an apocalyptic number.

It is an amenable number.

40809253 is a deficient number, since it is larger than the sum of its proper divisors (376243).

40809253 is a wasteful number, since it uses less digits than its factorization.

40809253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 40809253 is about 6388.2120346776. The cubic root of 40809253 is about 344.2861470060.

The spelling of 40809253 in words is "forty million, eight hundred nine thousand, two hundred fifty-three".