1131230290 has 16 divisors (see below), whose sum is σ = 2036676312. Its totient is φ = 452389504.

The previous prime is 1131230257. The next prime is 1131230293. The reversal of 1131230290 is 920321311.

It can be written as a sum of positive squares in 4 ways, for example, as 882505849 + 248724441 = 29707^2 + 15771^2 .

It is not an unprimeable number, because it can be changed into a prime (1131230293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46572 + ... + 66568.

Almost surely, 2^1131230290 is an apocalyptic number.

1131230290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131230290 is a deficient number, since it is larger than the sum of its proper divisors (905446022).

1131230290 is a wasteful number, since it uses less digits than its factorization.

1131230290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25661.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1131230290 is about 33633.7671098555. The cubic root of 1131230290 is about 1041.9583078724.

The spelling of 1131230290 in words is "one billion, one hundred thirty-one million, two hundred thirty thousand, two hundred ninety".