102643830 has 24 divisors (see below), whose sum is σ = 266874192. Its totient is φ = 27371664.

The previous prime is 102643829. The next prime is 102643837. The reversal of 102643830 is 38346201.

It is a happy number.

102643830 is a `hidden beast` number, since 10 + 2 + 643 + 8 + 3 + 0 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102643794 and 102643803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102643837) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 570154 + ... + 570333.

It is an arithmetic number, because the mean of its divisors is an integer number (11119758).

Almost surely, 2^102643830 is an apocalyptic number.

102643830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102643830 is an abundant number, since it is smaller than the sum of its proper divisors (164230362).

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

102643830 is a wasteful number, since it uses less digits than its factorization.

102643830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140500 (or 1140497 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 102643830 is about 10131.3291329420. The cubic root of 102643830 is about 468.2138787917.

The spelling of 102643830 in words is "one hundred two million, six hundred forty-three thousand, eight hundred thirty".