1889721364 has 6 divisors (see below), whose sum is σ = 3307012394. Its totient is φ = 944860680.

The previous prime is 1889721359. The next prime is 1889721371. The reversal of 1889721364 is 4631279881.

It can be written as a sum of positive squares in only one way, i.e., 1888597764 + 1123600 = 43458^2 + 1060^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 236215167 + ... + 236215174.

Almost surely, 2^1889721364 is an apocalyptic number.

It is an amenable number.

1889721364 is a deficient number, since it is larger than the sum of its proper divisors (1417291030).

1889721364 is a wasteful number, since it uses less digits than its factorization.

1889721364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472430345 (or 472430343 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

The square root of 1889721364 is about 43470.9255019950. The cubic root of 1889721364 is about 1236.3248283083.

The spelling of 1889721364 in words is "one billion, eight hundred eighty-nine million, seven hundred twenty-one thousand, three hundred sixty-four".