1228905800 has 24 divisors (see below), whose sum is σ = 2857206450. Its totient is φ = 491562240.

The previous prime is 1228905793. The next prime is 1228905823. The reversal of 1228905800 is 85098221.

It can be written as a sum of positive squares in 3 ways, for example, as 944578756 + 284327044 = 30734^2 + 16862^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3072065 + ... + 3072464.

Almost surely, 2^1228905800 is an apocalyptic number.

1228905800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228905800 is an abundant number, since it is smaller than the sum of its proper divisors (1628300650).

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

1228905800 is a wasteful number, since it uses less digits than its factorization.

1228905800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6144545 (or 6144536 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1228905800 is about 35055.7527376036. The cubic root of 1228905800 is about 1071.1234597033.

The spelling of 1228905800 in words is "one billion, two hundred twenty-eight million, nine hundred five thousand, eight hundred".