21860298 has 48 divisors (see below), whose sum is σ = 51105600. Its totient is φ = 6730560.

The previous prime is 21860273. The next prime is 21860323. The reversal of 21860298 is 89206812.

It is an interprime number because it is at equal distance from previous prime (21860273) and next prime (21860323).

It is a Curzon 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, 13243 + ... + 14801.

It is an arithmetic number, because the mean of its divisors is an integer number (1064700).

Almost surely, 2^21860298 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21860298, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25552800).

21860298 is an abundant number, since it is smaller than the sum of its proper divisors (29245302).

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

21860298 is a wasteful number, since it uses less digits than its factorization.

21860298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627 (or 1624 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 21860298 is about 4675.4997593840. The cubic root of 21860298 is about 279.6095663744.

It can be divided in two parts, 218 and 60298, that added together give a square (60516 = 246²).

The spelling of 21860298 in words is "twenty-one million, eight hundred sixty thousand, two hundred ninety-eight".