981487956 has 12 divisors (see below), whose sum is σ = 2290138592. Its totient is φ = 327162648.

The previous prime is 981487933. The next prime is 981487957. The reversal of 981487956 is 659784189.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 981487896 and 981487905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981487957) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 40895320 + ... + 40895343.

Almost surely, 2^981487956 is an apocalyptic number.

It is an amenable number.

981487956 is an abundant number, since it is smaller than the sum of its proper divisors (1308650636).

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

981487956 is a wasteful number, since it uses less digits than its factorization.

981487956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81790670 (or 81790668 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 57.

The square root of 981487956 is about 31328.7081763676. The cubic root of 981487956 is about 993.7908448542.

The spelling of 981487956 in words is "nine hundred eighty-one million, four hundred eighty-seven thousand, nine hundred fifty-six".