10861820 has 24 divisors (see below), whose sum is σ = 23242464. Its totient is φ = 4262336.

The previous prime is 10861817. The next prime is 10861859. The reversal of 10861820 is 2816801.

It is a self number, because there is not a number n which added to its sum of digits gives 10861820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4064 + ... + 6183.

It is an arithmetic number, because the mean of its divisors is an integer number (968436).

Almost surely, 2^10861820 is an apocalyptic number.

10861820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10861820 is an abundant number, since it is smaller than the sum of its proper divisors (12380644).

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

10861820 is a wasteful number, since it uses less digits than its factorization.

10861820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10309 (or 10307 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 10861820 is about 3295.7275372822. The cubic root of 10861820 is about 221.4628411356.

The spelling of 10861820 in words is "ten million, eight hundred sixty-one thousand, eight hundred twenty".