981641700 has 144 divisors (see below), whose sum is σ = 3398671360. Its totient is φ = 241626240.

The previous prime is 981641681. The next prime is 981641719. The reversal of 981641700 is 7146189.

981641700 is a `hidden beast` number, since 9 + 8 + 1 + 641 + 7 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (981641681) and next prime (981641719).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 21117 + ... + 49083.

Almost surely, 2^981641700 is an apocalyptic number.

981641700 is a gapful number since it is divisible by the number (90) 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 981641700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1699335680).

981641700 is an abundant number, since it is smaller than the sum of its proper divisors (2417029660).

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

981641700 is a wasteful number, since it uses less digits than its factorization.

981641700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28003 (or 27990 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 981641700 is about 31331.1618041847. The cubic root of 981641700 is about 993.8427325354.

Adding to 981641700 its reverse (7146189), we get a palindrome (988787889).

The spelling of 981641700 in words is "nine hundred eighty-one million, six hundred forty-one thousand, seven hundred".