1984496640 has 176 divisors, whose sum is σ = 7254436992. Its totient is φ = 453574656.

The previous prime is 1984496627. The next prime is 1984496641. The reversal of 1984496640 is 466944891.

It is not an unprimeable number, because it can be changed into a prime (1984496641) 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, 98292 + ... + 116748.

It is an arithmetic number, because the mean of its divisors is an integer number (41218392).

Almost surely, 2^1984496640 is an apocalyptic number.

1984496640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1984496640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3627218496).

1984496640 is an abundant number, since it is smaller than the sum of its proper divisors (5269940352).

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

1984496640 is a wasteful number, since it uses less digits than its factorization.

1984496640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18492 (or 18474 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 1984496640 is about 44547.6895023749. The cubic root of 1984496640 is about 1256.6571000107.

The spelling of 1984496640 in words is "one billion, nine hundred eighty-four million, four hundred ninety-six thousand, six hundred forty".