1213284140 has 48 divisors (see below), whose sum is σ = 2685160800. Its totient is φ = 459228672.

The previous prime is 1213284103. The next prime is 1213284161. The reversal of 1213284140 is 414823121.

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, 488582 + ... + 491058.

It is an arithmetic number, because the mean of its divisors is an integer number (55940850).

Almost surely, 2^1213284140 is an apocalyptic number.

1213284140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213284140 is an abundant number, since it is smaller than the sum of its proper divisors (1471876660).

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

1213284140 is a wasteful number, since it uses less digits than its factorization.

1213284140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794 (or 3792 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1213284140 is about 34832.2284673261. The cubic root of 1213284140 is about 1066.5654393955.

The spelling of 1213284140 in words is "one billion, two hundred thirteen million, two hundred eighty-four thousand, one hundred forty".