10691028 has 72 divisors (see below), whose sum is σ = 29719872. Its totient is φ = 3348864.

The previous prime is 10690997. The next prime is 10691081. The reversal of 10691028 is 82019601.

It is a super-2 number, since 2×10691028² = 228596159393568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 10690992 and 10691010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16201 + ... + 16847.

It is an arithmetic number, because the mean of its divisors is an integer number (412776).

Almost surely, 2^10691028 is an apocalyptic number.

10691028 is a gapful number since it is divisible by the number (18) 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 10691028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14859936).

10691028 is an abundant number, since it is smaller than the sum of its proper divisors (19028844).

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

10691028 is a wasteful number, since it uses less digits than its factorization.

10691028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 10691028 is about 3269.7137489389. The cubic root of 10691028 is about 220.2959378224.

The spelling of 10691028 in words is "ten million, six hundred ninety-one thousand, twenty-eight".