1218950628 has 48 divisors (see below), whose sum is σ = 3355398144. Its totient is φ = 337036320.

The previous prime is 1218950611. The next prime is 1218950633. The reversal of 1218950628 is 8260598121.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1218950628.

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, 231450 + ... + 236657.

It is an arithmetic number, because the mean of its divisors is an integer number (69904128).

Almost surely, 2^1218950628 is an apocalyptic number.

It is an amenable number.

1218950628 is an abundant number, since it is smaller than the sum of its proper divisors (2136447516).

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

1218950628 is a wasteful number, since it uses less digits than its factorization.

1218950628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468152 (or 468150 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 1218950628 is about 34913.4734450756. The cubic root of 1218950628 is about 1068.2232801977.

The spelling of 1218950628 in words is "one billion, two hundred eighteen million, nine hundred fifty thousand, six hundred twenty-eight".