383999972 has 6 divisors (see below), whose sum is σ = 671999958. Its totient is φ = 191999984.

The previous prime is 383999971. The next prime is 383999983. The reversal of 383999972 is 279999383.

It can be written as a sum of positive squares in only one way, i.e., 333646756 + 50353216 = 18266^2 + 7096^2 .

It is not an unprimeable number, because it can be changed into a prime (383999971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47999993 + ... + 48000000.

It is an arithmetic number, because the mean of its divisors is an integer number (111999993).

Almost surely, 2^383999972 is an apocalyptic number.

It is an amenable number.

383999972 is a deficient number, since it is larger than the sum of its proper divisors (287999986).

383999972 is a wasteful number, since it uses less digits than its factorization.

383999972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95999997 (or 95999995 counting only the distinct ones).

The product of its digits is 6613488, while the sum is 59.

The square root of 383999972 is about 19595.9172278309. The cubic root of 383999972 is about 726.8482194664.

The spelling of 383999972 in words is "three hundred eighty-three million, nine hundred ninety-nine thousand, nine hundred seventy-two".