655705428 has 192 divisors, whose sum is σ = 1969766400. Its totient is φ = 165473280.

The previous prime is 655705423. The next prime is 655705429. The reversal of 655705428 is 824507556.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 655705428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655705423) 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 63 ways as a sum of consecutive naturals, for example, 1434576 + ... + 1435032.

It is an arithmetic number, because the mean of its divisors is an integer number (10259200).

Almost surely, 2^655705428 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 655705428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (984883200).

655705428 is an abundant number, since it is smaller than the sum of its proper divisors (1314060972).

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

655705428 is a wasteful number, since it uses less digits than its factorization.

655705428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 42.

The square root of 655705428 is about 25606.7457518522. The cubic root of 655705428 is about 868.7662205070.

The spelling of 655705428 in words is "six hundred fifty-five million, seven hundred five thousand, four hundred twenty-eight".