1984404540 has 24 divisors (see below), whose sum is σ = 5556332880. Its totient is φ = 529174528.

The previous prime is 1984404523. The next prime is 1984404589. The reversal of 1984404540 is 454044891.

It is a super-2 number, since 2×1984404540² = 7875722756745223200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16536645 + ... + 16536764.

It is an arithmetic number, because the mean of its divisors is an integer number (231513870).

Almost surely, 2^1984404540 is an apocalyptic number.

1984404540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1984404540 is an abundant number, since it is smaller than the sum of its proper divisors (3571928340).

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

1984404540 is a wasteful number, since it uses less digits than its factorization.

1984404540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33073421 (or 33073419 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 1984404540 is about 44546.6557667352. The cubic root of 1984404540 is about 1256.6376593279.

The spelling of 1984404540 in words is "one billion, nine hundred eighty-four million, four hundred four thousand, five hundred forty".