1447989138 has 24 divisors (see below), whose sum is σ = 3210272208. Its totient is φ = 471438072.

The previous prime is 1447989121. The next prime is 1447989167. The reversal of 1447989138 is 8319897441.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 934620 + ... + 936167.

It is an arithmetic number, because the mean of its divisors is an integer number (133761342).

Almost surely, 2^1447989138 is an apocalyptic number.

1447989138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1447989138 is an abundant number, since it is smaller than the sum of its proper divisors (1762283070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1447989138 is a wasteful number, since it uses less digits than its factorization.

1447989138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870838 (or 1870835 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 1447989138 is about 38052.4524571019. The cubic root of 1447989138 is about 1131.3277363102.

The spelling of 1447989138 in words is "one billion, four hundred forty-seven million, nine hundred eighty-nine thousand, one hundred thirty-eight".