616571028 has 240 divisors, whose sum is σ = 1850010624. Its totient is φ = 177914880.

The previous prime is 616571027. The next prime is 616571077. The reversal of 616571028 is 820175616.

616571028 is a `hidden beast` number, since 61 + 6 + 571 + 0 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 616570983 and 616571001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616571027) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3927126 + ... + 3927282.

Almost surely, 2^616571028 is an apocalyptic number.

616571028 is a gapful number since it is divisible by the number (68) 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 616571028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (925005312).

616571028 is an abundant number, since it is smaller than the sum of its proper divisors (1233439596).

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

616571028 is a wasteful number, since it uses less digits than its factorization.

616571028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 616571028 is about 24830.8483141434. The cubic root of 616571028 is about 851.1270070124.

The spelling of 616571028 in words is "six hundred sixteen million, five hundred seventy-one thousand, twenty-eight".