985728780 has 72 divisors (see below), whose sum is σ = 2992626000. Its totient is φ = 262634112.

The previous prime is 985728767. The next prime is 985728787. The reversal of 985728780 is 87827589.

It is a super-2 number, since 2×985728780² = 1943322455440576800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (985728787) 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, 363871 + ... + 366569.

It is an arithmetic number, because the mean of its divisors is an integer number (41564250).

Almost surely, 2^985728780 is an apocalyptic number.

985728780 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

985728780 is an abundant number, since it is smaller than the sum of its proper divisors (2006897220).

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

985728780 is a wasteful number, since it uses less digits than its factorization.

985728780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4743 (or 4738 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 54.

The square root of 985728780 is about 31396.3179369811. The cubic root of 985728780 is about 995.2201157759.

The spelling of 985728780 in words is "nine hundred eighty-five million, seven hundred twenty-eight thousand, seven hundred eighty".