609984780 has 24 divisors (see below), whose sum is σ = 1707957552. Its totient is φ = 162662592.

The previous prime is 609984773. The next prime is 609984787. The reversal of 609984780 is 87489906.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (609984773) and next prime (609984787).

It is not an unprimeable number, because it can be changed into a prime (609984787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5083147 + ... + 5083266.

It is an arithmetic number, because the mean of its divisors is an integer number (71164898).

Almost surely, 2^609984780 is an apocalyptic number.

609984780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

609984780 is an abundant number, since it is smaller than the sum of its proper divisors (1097972772).

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

609984780 is a wasteful number, since it uses less digits than its factorization.

609984780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10166425 (or 10166423 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 609984780 is about 24697.8699486413. The cubic root of 609984780 is about 848.0855552549.

The spelling of 609984780 in words is "six hundred nine million, nine hundred eighty-four thousand, seven hundred eighty".