3654438381 has 12 divisors (see below), whose sum is σ = 5758509120. Its totient is φ = 2214811080.

The previous prime is 3654438367. The next prime is 3654438383. The reversal of 3654438381 is 1838344563.

It is not a de Polignac number, because 3654438381 - 2⁵ = 3654438349 is a prime.

It is a super-2 number, since 2×3654438381² = 26709839761051802322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3654438383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18456661 + ... + 18456858.

It is an arithmetic number, because the mean of its divisors is an integer number (479875760).

Almost surely, 2^3654438381 is an apocalyptic number.

It is an amenable number.

3654438381 is a deficient number, since it is larger than the sum of its proper divisors (2104070739).

3654438381 is a wasteful number, since it uses less digits than its factorization.

3654438381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36913536 (or 36913533 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 3654438381 is about 60451.9510106994. The cubic root of 3654438381 is about 1540.3055531618.

The spelling of 3654438381 in words is "three billion, six hundred fifty-four million, four hundred thirty-eight thousand, three hundred eighty-one".