1228836881 has 2 divisors, whose sum is σ = 1228836882. Its totient is φ = 1228836880.

The previous prime is 1228836841. The next prime is 1228836941. The reversal of 1228836881 is 1886388221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1190595025 + 38241856 = 34505^2 + 6184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228836881 - 2¹⁰ = 1228835857 is a prime.

It is a super-2 number, since 2×1228836881² = 3020080160211616322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1228836811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614418440 + 614418441.

It is an arithmetic number, because the mean of its divisors is an integer number (614418441).

Almost surely, 2^1228836881 is an apocalyptic number.

It is an amenable number.

1228836881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228836881 is an equidigital number, since it uses as much as digits as its factorization.

1228836881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294912, while the sum is 47.

The square root of 1228836881 is about 35054.7697325200. The cubic root of 1228836881 is about 1071.1034358909.

The spelling of 1228836881 in words is "one billion, two hundred twenty-eight million, eight hundred thirty-six thousand, eight hundred eighty-one".