1220298738 has 24 divisors (see below), whose sum is σ = 2477622672. Its totient is φ = 400686264.

The previous prime is 1220298721. The next prime is 1220298749. The reversal of 1220298738 is 8378920221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220298738.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4281 + ... + 49587.

It is an arithmetic number, because the mean of its divisors is an integer number (103234278).

Almost surely, 2^1220298738 is an apocalyptic number.

1220298738 is an abundant number, since it is smaller than the sum of its proper divisors (1257323934).

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

1220298738 is an equidigital number, since it uses as much as digits as its factorization.

1220298738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45446 (or 45379 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1220298738 is about 34932.7745534190. The cubic root of 1220298738 is about 1068.6169389968.

The spelling of 1220298738 in words is "one billion, two hundred twenty million, two hundred ninety-eight thousand, seven hundred thirty-eight".