616320840 has 128 divisors (see below), whose sum is σ = 1915637760. Its totient is φ = 158505984.

The previous prime is 616320799. The next prime is 616320853. The reversal of 616320840 is 48023616.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 616320798 and 616320807.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 563334 + ... + 564426.

It is an arithmetic number, because the mean of its divisors is an integer number (14965920).

Almost surely, 2^616320840 is an apocalyptic number.

616320840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 616320840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (957818880).

616320840 is an abundant number, since it is smaller than the sum of its proper divisors (1299316920).

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

616320840 is a wasteful number, since it uses less digits than its factorization.

616320840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 616320840 is about 24825.8099565754. The cubic root of 616320840 is about 851.0118699276.

The spelling of 616320840 in words is "six hundred sixteen million, three hundred twenty thousand, eight hundred forty".