9981400 has 96 divisors (see below), whose sum is σ = 27342000. Its totient is φ = 3340800.

The previous prime is 9981383. The next prime is 9981463. The reversal of 9981400 is 41899.

It is a congruent number.

It is an unprimeable number.

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, 28426 + ... + 28774.

Almost surely, 2^9981400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9981400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13671000).

9981400 is an abundant number, since it is smaller than the sum of its proper divisors (17360600).

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

9981400 is a wasteful number, since it uses less digits than its factorization.

9981400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 9981400 is about 3159.3353731442. The cubic root of 9981400 is about 215.3098111503.

The spelling of 9981400 in words is "nine million, nine hundred eighty-one thousand, four hundred".