3993881955 has 48 divisors (see below), whose sum is σ = 7614873504. Its totient is φ = 1781230080.

The previous prime is 3993881953. The next prime is 3993881963. The reversal of 3993881955 is 5591883993.

It is a happy number.

It is not a de Polignac number, because 3993881955 - 2¹ = 3993881953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3993881953) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36132 + ... + 96401.

It is an arithmetic number, because the mean of its divisors is an integer number (158643198).

Almost surely, 2^3993881955 is an apocalyptic number.

3993881955 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3993881955 is a deficient number, since it is larger than the sum of its proper divisors (3620991549).

3993881955 is a wasteful number, since it uses less digits than its factorization.

3993881955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132596 (or 132589 counting only the distinct ones).

The product of its digits is 10497600, while the sum is 60.

The square root of 3993881955 is about 63197.1673020239. The cubic root of 3993881955 is about 1586.5913230755.

The spelling of 3993881955 in words is "three billion, nine hundred ninety-three million, eight hundred eighty-one thousand, nine hundred fifty-five".