1984138548 has 48 divisors (see below), whose sum is σ = 5297604480. Its totient is φ = 566193024.

The previous prime is 1984138547. The next prime is 1984138549. The reversal of 1984138548 is 8458314891.

It is an interprime number because it is at equal distance from previous prime (1984138547) and next prime (1984138549).

It is a self number, because there is not a number n which added to its sum of digits gives 1984138548.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1984138547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55390 + ... + 83882.

It is an arithmetic number, because the mean of its divisors is an integer number (110366760).

Almost surely, 2^1984138548 is an apocalyptic number.

It is an amenable number.

1984138548 is an abundant number, since it is smaller than the sum of its proper divisors (3313465932).

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

1984138548 is a wasteful number, since it uses less digits than its factorization.

1984138548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29336 (or 29334 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 51.

The square root of 1984138548 is about 44543.6701227009. The cubic root of 1984138548 is about 1256.5815097385.

The spelling of 1984138548 in words is "one billion, nine hundred eighty-four million, one hundred thirty-eight thousand, five hundred forty-eight".