3644460381 has 8 divisors (see below), whose sum is σ = 4862804704. Its totient is φ = 2427878160.

The previous prime is 3644460371. The next prime is 3644460401. The reversal of 3644460381 is 1830644463.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3644460381 - 2²³ = 3636071773 is a prime.

It is a super-2 number, since 2×3644460381² = 26564182937357330322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644460301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435691 + ... + 443976.

It is an arithmetic number, because the mean of its divisors is an integer number (607850588).

Almost surely, 2^3644460381 is an apocalyptic number.

It is an amenable number.

3644460381 is a deficient number, since it is larger than the sum of its proper divisors (1218344323).

3644460381 is a wasteful number, since it uses less digits than its factorization.

3644460381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881051.

The product of its (nonzero) digits is 165888, while the sum is 39.

The square root of 3644460381 is about 60369.3662464664. The cubic root of 3644460381 is about 1538.9024029515.

The spelling of 3644460381 in words is "three billion, six hundred forty-four million, four hundred sixty thousand, three hundred eighty-one".