616217280 has 224 divisors, whose sum is σ = 2259518976. Its totient is φ = 139370496.

The previous prime is 616217269. The next prime is 616217293. The reversal of 616217280 is 82712616.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

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, 718612 + ... + 719468.

Almost surely, 2^616217280 is an apocalyptic number.

616217280 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 616217280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1129759488).

616217280 is an abundant number, since it is smaller than the sum of its proper divisors (1643301696).

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

616217280 is a wasteful number, since it uses less digits than its factorization.

616217280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 981 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 616217280 is about 24823.7241363982. The cubic root of 616217280 is about 850.9642022626.

Adding to 616217280 its reverse (82712616), we get a palindrome (698929896).

The spelling of 616217280 in words is "six hundred sixteen million, two hundred seventeen thousand, two hundred eighty".