1228501290 has 16 divisors (see below), whose sum is σ = 2948403168. Its totient is φ = 327600336.

The previous prime is 1228501273. The next prime is 1228501303. The reversal of 1228501290 is 921058221.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 40950043 = 1228501290 / (1 + 2 + 2 + 8 + 5 + 0 + 1 + 2 + 9 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20474992 + ... + 20475051.

It is an arithmetic number, because the mean of its divisors is an integer number (184275198).

Almost surely, 2^1228501290 is an apocalyptic number.

1228501290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1228501290 is an abundant number, since it is smaller than the sum of its proper divisors (1719901878).

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

1228501290 is a wasteful number, since it uses less digits than its factorization.

1228501290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40950053.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 1228501290 is about 35049.9827389401. The cubic root of 1228501290 is about 1071.0059221618.

The spelling of 1228501290 in words is "one billion, two hundred twenty-eight million, five hundred one thousand, two hundred ninety".