981840735 has 24 divisors (see below), whose sum is σ = 1743369264. Its totient is φ = 510875520.

The previous prime is 981840731. The next prime is 981840779. The reversal of 981840735 is 537048189.

It is not a de Polignac number, because 981840735 - 2² = 981840731 is a prime.

It is a super-2 number, since 2×981840735² = 1928022457810680450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981840731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264237 + ... + 267926.

It is an arithmetic number, because the mean of its divisors is an integer number (72640386).

Almost surely, 2^981840735 is an apocalyptic number.

981840735 is a deficient number, since it is larger than the sum of its proper divisors (761528529).

981840735 is a wasteful number, since it uses less digits than its factorization.

981840735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532215 (or 532212 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 981840735 is about 31334.3379537529. The cubic root of 981840735 is about 993.9098976122.

The spelling of 981840735 in words is "nine hundred eighty-one million, eight hundred forty thousand, seven hundred thirty-five".