40891829 has 6 divisors (see below), whose sum is σ = 44947350. Its totient is φ = 37174280.

The previous prime is 40891789. The next prime is 40891831. The reversal of 40891829 is 92819804.

It can be written as a sum of positive squares in only one way, i.e., 28111204 + 12780625 = 5302^2 + 3575^2 .

It is not a de Polignac number, because 40891829 - 2¹² = 40887733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40891849) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168854 + ... + 169095.

It is an arithmetic number, because the mean of its divisors is an integer number (7491225).

Almost surely, 2^40891829 is an apocalyptic number.

It is an amenable number.

40891829 is a deficient number, since it is larger than the sum of its proper divisors (4055521).

40891829 is a wasteful number, since it uses less digits than its factorization.

40891829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337971 (or 337960 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 40891829 is about 6394.6719227807. The cubic root of 40891829 is about 344.5182072765.

The spelling of 40891829 in words is "forty million, eight hundred ninety-one thousand, eight hundred twenty-nine".