799780000 has 60 divisors (see below), whose sum is σ = 1967627970. Its totient is φ = 319904000.

The previous prime is 799779991. The next prime is 799780001. The reversal of 799780000 is 87997.

It can be written as a sum of positive squares in 5 ways, for example, as 5216656 + 794563344 = 2284^2 + 28188^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (799780001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6 + ... + 39994.

Almost surely, 2^799780000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 799780000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (983813985).

799780000 is an abundant number, since it is smaller than the sum of its proper divisors (1167847970).

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

799780000 is an equidigital number, since it uses as much as digits as its factorization.

799780000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40019 (or 39996 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 799780000 is about 28280.3818927539. The cubic root of 799780000 is about 928.2326631256.

The spelling of 799780000 in words is "seven hundred ninety-nine million, seven hundred eighty thousand".