1989362774 has 16 divisors (see below), whose sum is σ = 3458370816. Its totient is φ = 840575400.

The previous prime is 1989362743. The next prime is 1989362779. The reversal of 1989362774 is 4772639891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989362779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 999692 + ... + 1001679.

It is an arithmetic number, because the mean of its divisors is an integer number (216148176).

Almost surely, 2^1989362774 is an apocalyptic number.

1989362774 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1989362774 is a deficient number, since it is larger than the sum of its proper divisors (1469008042).

1989362774 is a wasteful number, since it uses less digits than its factorization.

1989362774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001451.

The product of its digits is 4572288, while the sum is 56.

The square root of 1989362774 is about 44602.2731931905. The cubic root of 1989362774 is about 1257.6834006385.

The spelling of 1989362774 in words is "one billion, nine hundred eighty-nine million, three hundred sixty-two thousand, seven hundred seventy-four".