3647891949 has 16 divisors (see below), whose sum is σ = 5239852800. Its totient is φ = 2244062016.

The previous prime is 3647891939. The next prime is 3647891957. The reversal of 3647891949 is 9491987463.

It is not a de Polignac number, because 3647891949 - 2⁸ = 3647891693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3647891892 and 3647891901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3647891939) 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, 106647 + ... + 136635.

It is an arithmetic number, because the mean of its divisors is an integer number (327490800).

Almost surely, 2^3647891949 is an apocalyptic number.

3647891949 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3647891949 is a deficient number, since it is larger than the sum of its proper divisors (1591960851).

3647891949 is a wasteful number, since it uses less digits than its factorization.

3647891949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33124.

The product of its digits is 11757312, while the sum is 60.

The square root of 3647891949 is about 60397.7809940067. The cubic root of 3647891949 is about 1539.3852537351.

The spelling of 3647891949 in words is "three billion, six hundred forty-seven million, eight hundred ninety-one thousand, nine hundred forty-nine".