1660928328 has 48 divisors (see below), whose sum is σ = 4664958480. Its totient is φ = 553642128.

The previous prime is 1660928309. The next prime is 1660928341. The reversal of 1660928328 is 8238290661.

1660928328 is a `hidden beast` number, since 1 + 6 + 609 + 2 + 8 + 32 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 425250 + ... + 429137.

It is an arithmetic number, because the mean of its divisors is an integer number (97186635).

Almost surely, 2^1660928328 is an apocalyptic number.

1660928328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1660928328 is an abundant number, since it is smaller than the sum of its proper divisors (3004030152).

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

1660928328 is an equidigital number, since it uses as much as digits as its factorization.

1660928328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854408 (or 854392 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 1660928328 is about 40754.4884399252. The cubic root of 1660928328 is about 1184.2688263003.

The spelling of 1660928328 in words is "one billion, six hundred sixty million, nine hundred twenty-eight thousand, three hundred twenty-eight".