10691898 has 48 divisors (see below), whose sum is σ = 25510464. Its totient is φ = 2976960.

The previous prime is 10691893. The next prime is 10691903. The reversal of 10691898 is 89819601.

It is an interprime number because it is at equal distance from previous prime (10691893) and next prime (10691903).

It is a super-2 number, since 2×10691898² = 228633365684808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (10691893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11611 + ... + 12497.

It is an arithmetic number, because the mean of its divisors is an integer number (531468).

Almost surely, 2^10691898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10691898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12755232).

10691898 is an abundant number, since it is smaller than the sum of its proper divisors (14818566).

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

10691898 is a wasteful number, since it uses less digits than its factorization.

10691898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 10691898 is about 3269.8467854014. The cubic root of 10691898 is about 220.3019133085.

The spelling of 10691898 in words is "ten million, six hundred ninety-one thousand, eight hundred ninety-eight".