614668728 has 64 divisors (see below), whose sum is σ = 1629810720. Its totient is φ = 192512000.

The previous prime is 614668723. The next prime is 614668739. The reversal of 614668728 is 827866416.

It is a super-2 number, since 2×614668728² = 755635290362275968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (614668723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383128 + ... + 384728.

Almost surely, 2^614668728 is an apocalyptic number.

614668728 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 614668728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (814905360).

614668728 is an abundant number, since it is smaller than the sum of its proper divisors (1015141992).

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

614668728 is a wasteful number, since it uses less digits than its factorization.

614668728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568 (or 2564 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The square root of 614668728 is about 24792.5135474401. The cubic root of 614668728 is about 850.2507809052.

The spelling of 614668728 in words is "six hundred fourteen million, six hundred sixty-eight thousand, seven hundred twenty-eight".