3646440231 has 16 divisors (see below), whose sum is σ = 5557920768. Its totient is φ = 2083140000.

The previous prime is 3646440191. The next prime is 3646440241. The reversal of 3646440231 is 1320446463.

It is not a de Polignac number, because 3646440231 - 2¹³ = 3646432039 is a prime.

It is a super-2 number, since 2×3646440231² = 26593052716510666722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3646440192 and 3646440201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3646440241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69106 + ... + 109856.

It is an arithmetic number, because the mean of its divisors is an integer number (347370048).

Almost surely, 2^3646440231 is an apocalyptic number.

3646440231 is a deficient number, since it is larger than the sum of its proper divisors (1911480537).

3646440231 is a wasteful number, since it uses less digits than its factorization.

3646440231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45022.

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 3646440231 is about 60385.7618234630. The cubic root of 3646440231 is about 1539.1810216446.

Adding to 3646440231 its reverse (1320446463), we get a palindrome (4966886694).

The spelling of 3646440231 in words is "three billion, six hundred forty-six million, four hundred forty thousand, two hundred thirty-one".