10998780 has 96 divisors (see below), whose sum is σ = 33868800. Its totient is φ = 2650368.

The previous prime is 10998763. The next prime is 10998781. The reversal of 10998780 is 8789901.

It is a super-2 number, since 2×10998780² = 241946322976800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10998781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45901 + ... + 46139.

It is an arithmetic number, because the mean of its divisors is an integer number (352800).

Almost surely, 2^10998780 is an apocalyptic number.

10998780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10998780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16934400).

10998780 is an abundant number, since it is smaller than the sum of its proper divisors (22870020).

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

10998780 is a wasteful number, since it uses less digits than its factorization.

10998780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 10998780 is about 3316.4408633353. The cubic root of 10998780 is about 222.3897867659.

It can be divided in two parts, 109 and 98780, that added together give a palindrome (98889).

The spelling of 10998780 in words is "ten million, nine hundred ninety-eight thousand, seven hundred eighty".