1213904016 has 160 divisors (see below), whose sum is σ = 3777536000. Its totient is φ = 373216896.

The previous prime is 1213904009. The next prime is 1213904017. The reversal of 1213904016 is 6104093121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1213904017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 948465 + ... + 949743.

It is an arithmetic number, because the mean of its divisors is an integer number (23609600).

Almost surely, 2^1213904016 is an apocalyptic number.

1213904016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213904016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1888768000).

1213904016 is an abundant number, since it is smaller than the sum of its proper divisors (2563631984).

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

1213904016 is a wasteful number, since it uses less digits than its factorization.

1213904016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1213904016 is about 34841.1253549595. The cubic root of 1213904016 is about 1066.7470472412.

Adding to 1213904016 its reverse (6104093121), we get a palindrome (7317997137).

The spelling of 1213904016 in words is "one billion, two hundred thirteen million, nine hundred four thousand, sixteen".