1989272254 has 8 divisors (see below), whose sum is σ = 3113643600. Its totient is φ = 951391056.

The previous prime is 1989272251. The next prime is 1989272293. The reversal of 1989272254 is 4522729891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1989272198 and 1989272207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989272251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21622479 + ... + 21622570.

It is an arithmetic number, because the mean of its divisors is an integer number (389205450).

Almost surely, 2^1989272254 is an apocalyptic number.

1989272254 is a deficient number, since it is larger than the sum of its proper divisors (1124371346).

1989272254 is a wasteful number, since it uses less digits than its factorization.

1989272254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43245074.

The product of its digits is 725760, while the sum is 49.

The square root of 1989272254 is about 44601.2584351608. The cubic root of 1989272254 is about 1257.6643246426.

The spelling of 1989272254 in words is "one billion, nine hundred eighty-nine million, two hundred seventy-two thousand, two hundred fifty-four".