1812870291228 has 48 divisors (see below), whose sum is σ = 4320498330624. Its totient is φ = 591368927040.

The previous prime is 1812870291179. The next prime is 1812870291257. The reversal of 1812870291228 is 8221920782181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5195226 + ... + 5533182.

It is an arithmetic number, because the mean of its divisors is an integer number (90010381888).

Almost surely, 2^{1812870291228} is an apocalyptic number.

It is an amenable number.

1812870291228 is an abundant number, since it is smaller than the sum of its proper divisors (2507628039396).

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

1812870291228 is a wasteful number, since it uses less digits than its factorization.

1812870291228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347522 (or 347520 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 51.

The spelling of 1812870291228 in words is "one trillion, eight hundred twelve billion, eight hundred seventy million, two hundred ninety-one thousand, two hundred twenty-eight".