1000800388 has 48 divisors (see below), whose sum is σ = 2032128000. Its totient is φ = 422407584.

The previous prime is 1000800379. The next prime is 1000800391. The reversal of 1000800388 is 8830080001.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1159245 + ... + 1160107.

It is an arithmetic number, because the mean of its divisors is an integer number (42336000).

Almost surely, 2^1000800388 is an apocalyptic number.

It is an amenable number.

1000800388 is an abundant number, since it is smaller than the sum of its proper divisors (1031327612).

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

1000800388 is a wasteful number, since it uses less digits than its factorization.

1000800388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456 (or 1454 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1000800388 is about 31635.4293158794. The cubic root of 1000800388 is about 1000.2667248515.

Adding to 1000800388 its reverse (8830080001), we get a palindrome (9830880389).

The spelling of 1000800388 in words is "one billion, eight hundred thousand, three hundred eighty-eight".