981505900 has 18 divisors (see below), whose sum is σ = 2129868020. Its totient is φ = 392602320.

The previous prime is 981505891. The next prime is 981505913. The reversal of 981505900 is 9505189.

It is a self number, because there is not a number n which added to its sum of digits gives 981505900.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4907430 + ... + 4907629.

Almost surely, 2^981505900 is an apocalyptic number.

It is an amenable number.

981505900 is an abundant number, since it is smaller than the sum of its proper divisors (1148362120).

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

981505900 is a wasteful number, since it uses less digits than its factorization.

981505900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9815073 (or 9815066 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 981505900 is about 31328.9945577575. The cubic root of 981505900 is about 993.7969011262.

The spelling of 981505900 in words is "nine hundred eighty-one million, five hundred five thousand, nine hundred".