10218978 has 96 divisors (see below), whose sum is σ = 28259712. Its totient is φ = 2592000.

The previous prime is 10218953. The next prime is 10219003. The reversal of 10218978 is 87981201.

It is an interprime number because it is at equal distance from previous prime (10218953) and next prime (10219003).

It is a super-2 number, since 2×10218978² = 208855022728968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101128 + ... + 101228.

It is an arithmetic number, because the mean of its divisors is an integer number (294372).

Almost surely, 2^10218978 is an apocalyptic number.

10218978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10218978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14129856).

10218978 is an abundant number, since it is smaller than the sum of its proper divisors (18040734).

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

10218978 is a wasteful number, since it uses less digits than its factorization.

10218978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 10218978 is about 3196.7136249592. The cubic root of 10218978 is about 217.0047072959.

It can be divided in two parts, 1021 and 8978, that added together give a palindrome (9999).

The spelling of 10218978 in words is "ten million, two hundred eighteen thousand, nine hundred seventy-eight".