1228630831 has 4 divisors (see below), whose sum is σ = 1244183200. Its totient is φ = 1213078464.

The previous prime is 1228630771. The next prime is 1228630841. The reversal of 1228630831 is 1380368221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1228630831 - 2¹³ = 1228622639 is a prime.

It is a super-2 number, since 2×1228630831² = 3019067437767501122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228630841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7776066 + ... + 7776223.

It is an arithmetic number, because the mean of its divisors is an integer number (311045800).

Almost surely, 2^1228630831 is an apocalyptic number.

1228630831 is a deficient number, since it is larger than the sum of its proper divisors (15552369).

1228630831 is an equidigital number, since it uses as much as digits as its factorization.

1228630831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15552368.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1228630831 is about 35051.8306369296. The cubic root of 1228630831 is about 1071.0435654005.

The spelling of 1228630831 in words is "one billion, two hundred twenty-eight million, six hundred thirty thousand, eight hundred thirty-one".