1212903880 has 16 divisors (see below), whose sum is σ = 2729033820. Its totient is φ = 485161536.

The previous prime is 1212903847. The next prime is 1212903899. The reversal of 1212903880 is 883092121.

It can be written as a sum of positive squares in 2 ways, for example, as 1102107204 + 110796676 = 33198^2 + 10526^2 .

It is a super-2 number, since 2×1212903880² = 2942271644238108800, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 15161259 + ... + 15161338.

Almost surely, 2^1212903880 is an apocalyptic number.

1212903880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212903880 is an abundant number, since it is smaller than the sum of its proper divisors (1516129940).

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

1212903880 is a wasteful number, since it uses less digits than its factorization.

1212903880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30322608 (or 30322604 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1212903880 is about 34826.7695889240. The cubic root of 1212903880 is about 1066.4540023082.

The spelling of 1212903880 in words is "one billion, two hundred twelve million, nine hundred three thousand, eight hundred eighty".