3649616838 has 40 divisors (see below), whose sum is σ = 9346111632. Its totient is φ = 1042747344.

The previous prime is 3649616833. The next prime is 3649616857. The reversal of 3649616838 is 8386169463.

3649616838 is a `hidden beast` number, since 364 + 96 + 168 + 38 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649616833) 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 19 ways as a sum of consecutive naturals, for example, 1608045 + ... + 1610312.

Almost surely, 2^3649616838 is an apocalyptic number.

3649616838 is an abundant number, since it is smaller than the sum of its proper divisors (5696494794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3649616838 is a wasteful number, since it uses less digits than its factorization.

3649616838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218378 (or 3218369 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 3649616838 is about 60412.0587134721. The cubic root of 3649616838 is about 1539.6278459251.

The spelling of 3649616838 in words is "three billion, six hundred forty-nine million, six hundred sixteen thousand, eight hundred thirty-eight".