1051999648 has 48 divisors (see below), whose sum is σ = 2424752064. Its totient is φ = 439856640.

The previous prime is 1051999643. The next prime is 1051999649. The reversal of 1051999648 is 8469991501.

It is a happy number.

It is a super-2 number, since 2×1051999648² = 2213406518784247808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1051999595 and 1051999604.

It is not an unprimeable number, because it can be changed into a prime (1051999643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48090 + ... + 66457.

It is an arithmetic number, because the mean of its divisors is an integer number (50515668).

Almost surely, 2^1051999648 is an apocalyptic number.

It is an amenable number.

1051999648 is an abundant number, since it is smaller than the sum of its proper divisors (1372752416).

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

1051999648 is a wasteful number, since it uses less digits than its factorization.

1051999648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114605 (or 114597 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 52.

The square root of 1051999648 is about 32434.5440541408. The cubic root of 1051999648 is about 1017.0411650998.

The spelling of 1051999648 in words is "one billion, fifty-one million, nine hundred ninety-nine thousand, six hundred forty-eight".