1216703904 has 48 divisors (see below), whose sum is σ = 3439531872. Its totient is φ = 374370048.

The previous prime is 1216703879. The next prime is 1216703909. The reversal of 1216703904 is 4093076121.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (1216703909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486214 + ... + 488709.

It is an arithmetic number, because the mean of its divisors is an integer number (71656914).

Almost surely, 2^1216703904 is an apocalyptic number.

It is an amenable number.

1216703904 is an abundant number, since it is smaller than the sum of its proper divisors (2222827968).

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

1216703904 is a wasteful number, since it uses less digits than its factorization.

1216703904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974949 (or 974941 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 1216703904 is about 34881.2830039263. The cubic root of 1216703904 is about 1067.5665735547.

The spelling of 1216703904 in words is "one billion, two hundred sixteen million, seven hundred three thousand, nine hundred four".