1228520370 has 64 divisors (see below), whose sum is σ = 3675995136. Its totient is φ = 255276480.

The previous prime is 1228520369. The next prime is 1228520401. The reversal of 1228520370 is 730258221.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 263604 + ... + 268223.

It is an arithmetic number, because the mean of its divisors is an integer number (57437424).

Almost surely, 2^1228520370 is an apocalyptic number.

1228520370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1228520370 is an abundant number, since it is smaller than the sum of its proper divisors (2447474766).

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

1228520370 is a wasteful number, since it uses less digits than its factorization.

1228520370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531855.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 1228520370 is about 35050.2549206136. The cubic root of 1228520370 is about 1071.0114667734.

Adding to 1228520370 its reverse (730258221), we get a palindrome (1958778591).

The spelling of 1228520370 in words is "one billion, two hundred twenty-eight million, five hundred twenty thousand, three hundred seventy".