1231790280 has 64 divisors (see below), whose sum is σ = 4223283840. Its totient is φ = 281551872.

The previous prime is 1231790257. The next prime is 1231790297. The reversal of 1231790280 is 820971321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 732369 + ... + 734048.

It is an arithmetic number, because the mean of its divisors is an integer number (65988810).

Almost surely, 2^1231790280 is an apocalyptic number.

1231790280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231790280 is an abundant number, since it is smaller than the sum of its proper divisors (2991493560).

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

1231790280 is a wasteful number, since it uses less digits than its factorization.

1231790280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466438 (or 1466434 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1231790280 is about 35096.8699459083. The cubic root of 1231790280 is about 1071.9608496321.

The spelling of 1231790280 in words is "one billion, two hundred thirty-one million, seven hundred ninety thousand, two hundred eighty".