157728330 has 64 divisors (see below), whose sum is σ = 422611200. Its totient is φ = 41860800.

The previous prime is 157728317. The next prime is 157728359. The reversal of 157728330 is 33827751.

157728330 is a `hidden beast` number, since 1 + 577 + 2 + 83 + 3 + 0 = 666.

157728330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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, 60555 + ... + 63105.

It is an arithmetic number, because the mean of its divisors is an integer number (6603300).

Almost surely, 2^157728330 is an apocalyptic number.

157728330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 157728330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211305600).

157728330 is an abundant number, since it is smaller than the sum of its proper divisors (264882870).

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

157728330 is a wasteful number, since it uses less digits than its factorization.

157728330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2796 (or 2790 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 157728330 is about 12558.9939883734. The cubic root of 157728330 is about 540.3019915755.

The spelling of 157728330 in words is "one hundred fifty-seven million, seven hundred twenty-eight thousand, three hundred thirty".