1771328385 has 32 divisors (see below), whose sum is σ = 3202416000. Its totient is φ = 928692288.

The previous prime is 1771328353. The next prime is 1771328467. The reversal of 1771328385 is 5838231771.

It is not a de Polignac number, because 1771328385 - 2⁵ = 1771328353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1771328385.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 103230 + ... + 119159.

It is an arithmetic number, because the mean of its divisors is an integer number (100075500).

Almost surely, 2^1771328385 is an apocalyptic number.

1771328385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1771328385 is a deficient number, since it is larger than the sum of its proper divisors (1431087615).

1771328385 is a wasteful number, since it uses less digits than its factorization.

1771328385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222462 (or 222456 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 1771328385 is about 42087.1522557657. The cubic root of 1771328385 is about 1209.9470379569.

The spelling of 1771328385 in words is "one billion, seven hundred seventy-one million, three hundred twenty-eight thousand, three hundred eighty-five".