1811224988 has 12 divisors (see below), whose sum is σ = 3170526072. Its totient is φ = 905360400.

The previous prime is 1811224969. The next prime is 1811225023. The reversal of 1811224988 is 8894221181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46370 + ... + 75977.

It is an arithmetic number, because the mean of its divisors is an integer number (264210506).

Almost surely, 2^1811224988 is an apocalyptic number.

It is an amenable number.

1811224988 is a deficient number, since it is larger than the sum of its proper divisors (1359301084).

1811224988 is a wasteful number, since it uses less digits than its factorization.

1811224988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126052 (or 126050 counting only the distinct ones).

The product of its digits is 73728, while the sum is 44.

The square root of 1811224988 is about 42558.4890239303. The cubic root of 1811224988 is about 1218.9637774706.

The spelling of 1811224988 in words is "one billion, eight hundred eleven million, two hundred twenty-four thousand, nine hundred eighty-eight".