1228997770 has 64 divisors (see below), whose sum is σ = 2970245376. Its totient is φ = 353594880.

The previous prime is 1228997753. The next prime is 1228997771. The reversal of 1228997770 is 777998221.

It is not an unprimeable number, because it can be changed into a prime (1228997771) 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, 51379 + ... + 71398.

It is an arithmetic number, because the mean of its divisors is an integer number (46410084).

Almost surely, 2^1228997770 is an apocalyptic number.

1228997770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1228997770 is an abundant number, since it is smaller than the sum of its proper divisors (1741247606).

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

1228997770 is a wasteful number, since it uses less digits than its factorization.

1228997770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122815.

The product of its (nonzero) digits is 889056, while the sum is 52.

The square root of 1228997770 is about 35057.0644806436. The cubic root of 1228997770 is about 1071.1501796160.

The spelling of 1228997770 in words is "one billion, two hundred twenty-eight million, nine hundred ninety-seven thousand, seven hundred seventy".