1029993855 has 16 divisors (see below), whose sum is σ = 1797807744. Its totient is φ = 499390880.

The previous prime is 1029993851. The next prime is 1029993869. The reversal of 1029993855 is 5583999201.

It is not a de Polignac number, because 1029993855 - 2² = 1029993851 is a prime.

It is a super-2 number, since 2×1029993855² = 2121774682675522050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1029993798 and 1029993807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1029993851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3121029 + ... + 3121358.

It is an arithmetic number, because the mean of its divisors is an integer number (112362984).

Almost surely, 2^1029993855 is an apocalyptic number.

1029993855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1029993855 is a deficient number, since it is larger than the sum of its proper divisors (767813889).

1029993855 is a wasteful number, since it uses less digits than its factorization.

1029993855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6242406.

The product of its (nonzero) digits is 874800, while the sum is 51.

The square root of 1029993855 is about 32093.5173360603. The cubic root of 1029993855 is about 1009.8996256817.

The spelling of 1029993855 in words is "one billion, twenty-nine million, nine hundred ninety-three thousand, eight hundred fifty-five".