10999780 has 24 divisors (see below), whose sum is σ = 25200000. Its totient is φ = 3999840.

The previous prime is 10999771. The next prime is 10999811. The reversal of 10999780 is 8799901.

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, 24780 + ... + 25219.

It is an arithmetic number, because the mean of its divisors is an integer number (1050000).

Almost surely, 2^10999780 is an apocalyptic number.

10999780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10999780 is an abundant number, since it is smaller than the sum of its proper divisors (14200220).

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

10999780 is a wasteful number, since it uses less digits than its factorization.

10999780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50019 (or 50017 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 10999780 is about 3316.5916239417. The cubic root of 10999780 is about 222.3965263937.

The spelling of 10999780 in words is "ten million, nine hundred ninety-nine thousand, seven hundred eighty".