1218192630 has 32 divisors (see below), whose sum is σ = 3095643744. Its totient is φ = 305742336.

The previous prime is 1218192617. The next prime is 1218192637. The reversal of 1218192630 is 362918121.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1218192591 and 1218192600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218192637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1193797 + ... + 1194816.

It is an arithmetic number, because the mean of its divisors is an integer number (96738867).

Almost surely, 2^1218192630 is an apocalyptic number.

1218192630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1218192630 is an abundant number, since it is smaller than the sum of its proper divisors (1877451114).

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

1218192630 is a wasteful number, since it uses less digits than its factorization.

1218192630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388640.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1218192630 is about 34902.6163775726. The cubic root of 1218192630 is about 1068.0018112862.

The spelling of 1218192630 in words is "one billion, two hundred eighteen million, one hundred ninety-two thousand, six hundred thirty".