1799978544 has 480 divisors, whose sum is σ = 6712903680. Its totient is φ = 457228800.

The previous prime is 1799978497. The next prime is 1799978563. The reversal of 1799978544 is 4458799971.

1799978544 is a `hidden beast` number, since 17 + 9 + 9 + 9 + 78 + 544 = 666.

1799978544 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8530599 + ... + 8530809.

It is an arithmetic number, because the mean of its divisors is an integer number (13985216).

Almost surely, 2^1799978544 is an apocalyptic number.

1799978544 is a gapful number since it is divisible by the number (14) 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 1799978544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3356451840).

1799978544 is an abundant number, since it is smaller than the sum of its proper divisors (4912925136).

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

1799978544 is a wasteful number, since it uses less digits than its factorization.

1799978544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 267 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The square root of 1799978544 is about 42426.1540090544. The cubic root of 1799978544 is about 1216.4355657723.

The spelling of 1799978544 in words is "one billion, seven hundred ninety-nine million, nine hundred seventy-eight thousand, five hundred forty-four".