1774398985 has 16 divisors (see below), whose sum is σ = 2164465152. Its totient is φ = 1396158400.

The previous prime is 1774398971. The next prime is 1774398991. The reversal of 1774398985 is 5898934771.

It is not a de Polignac number, because 1774398985 - 2¹¹ = 1774396937 is a prime.

It is a super-3 number, since 3×1774398985³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147207 + ... + 158803.

It is an arithmetic number, because the mean of its divisors is an integer number (135279072).

Almost surely, 2^1774398985 is an apocalyptic number.

It is an amenable number.

1774398985 is a deficient number, since it is larger than the sum of its proper divisors (390066167).

1774398985 is a wasteful number, since it uses less digits than its factorization.

1774398985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12104.

The product of its digits is 15240960, while the sum is 61.

The square root of 1774398985 is about 42123.6155262105. The cubic root of 1774398985 is about 1210.6457825952.

The spelling of 1774398985 in words is "one billion, seven hundred seventy-four million, three hundred ninety-eight thousand, nine hundred eighty-five".