612399528 has 160 divisors (see below), whose sum is σ = 1864077600. Its totient is φ = 186717312.

The previous prime is 612399503. The next prime is 612399533. The reversal of 612399528 is 825993216.

612399528 is a `hidden beast` number, since 612 + 3 + 9 + 9 + 5 + 28 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1170675 + ... + 1171197.

It is an arithmetic number, because the mean of its divisors is an integer number (11650485).

Almost surely, 2^612399528 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 612399528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (932038800).

612399528 is an abundant number, since it is smaller than the sum of its proper divisors (1251678072).

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

612399528 is a wasteful number, since it uses less digits than its factorization.

612399528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 680 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 612399528 is about 24746.7074173515. The cubic root of 612399528 is about 849.2031877675.

The spelling of 612399528 in words is "six hundred twelve million, three hundred ninety-nine thousand, five hundred twenty-eight".