616819830 has 64 divisors (see below), whose sum is σ = 1645463808. Its totient is φ = 146706560.

The previous prime is 616819811. The next prime is 616819831. The reversal of 616819830 is 38918616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616819831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144 + ... + 35123.

It is an arithmetic number, because the mean of its divisors is an integer number (25710372).

Almost surely, 2^616819830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 616819830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (822731904).

616819830 is an abundant number, since it is smaller than the sum of its proper divisors (1028643978).

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

616819830 is a wasteful number, since it uses less digits than its factorization.

616819830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35341.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 616819830 is about 24835.8577464117. The cubic root of 616819830 is about 851.2414753729.

The spelling of 616819830 in words is "six hundred sixteen million, eight hundred nineteen thousand, eight hundred thirty".