3999747276 has 120 divisors (see below), whose sum is σ = 12073720736. Its totient is φ = 1130941440.

The previous prime is 3999747253. The next prime is 3999747289. The reversal of 3999747276 is 6727479993.

3999747276 is a `hidden beast` number, since 3 + 9 + 9 + 97 + 472 + 76 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 210906 + ... + 229086.

Almost surely, 2^3999747276 is an apocalyptic number.

3999747276 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3999747276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6036860368).

3999747276 is an abundant number, since it is smaller than the sum of its proper divisors (8073973460).

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

3999747276 is a wasteful number, since it uses less digits than its factorization.

3999747276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18301 (or 18290 counting only the distinct ones).

The product of its digits is 36006768, while the sum is 63.

The square root of 3999747276 is about 63243.5552131599. Note that the first 3 decimals coincide. The cubic root of 3999747276 is about 1587.3676200688.

The spelling of 3999747276 in words is "three billion, nine hundred ninety-nine million, seven hundred forty-seven thousand, two hundred seventy-six".