900000780 has 96 divisors (see below), whose sum is σ = 2896158720. Its totient is φ = 204560640.

The previous prime is 900000779. The next prime is 900000781. The reversal of 900000780 is 87000009.

It is an interprime number because it is at equal distance from previous prime (900000779) and next prime (900000781).

It is a self number, because there is not a number n which added to its sum of digits gives 900000780.

It is not an unprimeable number, because it can be changed into a prime (900000781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70101 + ... + 81939.

It is an arithmetic number, because the mean of its divisors is an integer number (30168320).

Almost surely, 2^900000780 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 900000780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448079360).

900000780 is an abundant number, since it is smaller than the sum of its proper divisors (1996157940).

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

900000780 is a wasteful number, since it uses less digits than its factorization.

900000780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12039 (or 12037 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 900000780 is about 30000.0129999972. The cubic root of 900000780 is about 965.4896635247.

Adding to 900000780 its reverse (87000009), we get a palindrome (987000789).

The spelling of 900000780 in words is "nine hundred million, seven hundred eighty", and thus it is an aban number.