1999392264 has 24 divisors (see below), whose sum is σ = 5415020910. Its totient is φ = 666464064.

The previous prime is 1999392251. The next prime is 1999392271. The reversal of 1999392264 is 4622939991.

1999392264 is a `hidden beast` number, since 199 + 9 + 392 + 2 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1676902500 + 322489764 = 40950^2 + 17958^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×1999392264³ (a number of 29 digits) contains 333 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1999392264.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13884597 + ... + 13884740.

Almost surely, 2^1999392264 is an apocalyptic number.

It is an amenable number.

1999392264 is an abundant number, since it is smaller than the sum of its proper divisors (3415628646).

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

1999392264 is a wasteful number, since it uses less digits than its factorization.

1999392264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27769349 (or 27769342 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 1999392264 is about 44714.5643387029. The cubic root of 1999392264 is about 1259.7934204033.

The spelling of 1999392264 in words is "one billion, nine hundred ninety-nine million, three hundred ninety-two thousand, two hundred sixty-four".