1427799808 has 72 divisors (see below), whose sum is σ = 3099578832. Its totient is φ = 653672448.

The previous prime is 1427799803. The next prime is 1427799811. The reversal of 1427799808 is 8089977241.

It is a happy number.

It is a super-2 number, since 2×1427799808² = 4077224583449673728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427799803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156591 + ... + 165457.

It is an arithmetic number, because the mean of its divisors is an integer number (43049706).

Almost surely, 2^1427799808 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 1427799808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1549789416).

1427799808 is an abundant number, since it is smaller than the sum of its proper divisors (1671779024).

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

1427799808 is an equidigital number, since it uses as much as digits as its factorization.

1427799808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8937 (or 8923 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 55.

The square root of 1427799808 is about 37786.2383414915. The cubic root of 1427799808 is about 1126.0450688497.

The spelling of 1427799808 in words is "one billion, four hundred twenty-seven million, seven hundred ninety-nine thousand, eight hundred eight".