611449728 has 128 divisors (see below), whose sum is σ = 1690295040. Its totient is φ = 195686400.

The previous prime is 611449703. The next prime is 611449739. The reversal of 611449728 is 827944116.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 611449728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1117551 + ... + 1118097.

It is an arithmetic number, because the mean of its divisors is an integer number (13205430).

Almost surely, 2^611449728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611449728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845147520).

611449728 is an abundant number, since it is smaller than the sum of its proper divisors (1078845312).

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

611449728 is a wasteful number, since it uses less digits than its factorization.

611449728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 664 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 611449728 is about 24727.5095389730. The cubic root of 611449728 is about 848.7639371939.

The spelling of 611449728 in words is "six hundred eleven million, four hundred forty-nine thousand, seven hundred twenty-eight".