1213644480 has 56 divisors (see below), whose sum is σ = 3853324272. Its totient is φ = 323638272.

The previous prime is 1213644479. The next prime is 1213644617. The reversal of 1213644480 is 844463121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631147 + ... + 633066.

It is an arithmetic number, because the mean of its divisors is an integer number (68809362).

Almost surely, 2^1213644480 is an apocalyptic number.

1213644480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213644480 is an abundant number, since it is smaller than the sum of its proper divisors (2639679792).

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

1213644480 is a wasteful number, since it uses less digits than its factorization.

1213644480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264233 (or 1264223 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 1213644480 is about 34837.4005918926. The cubic root of 1213644480 is about 1066.6710173434.

It can be divided in two parts, 12136 and 44480, that added together give a triangular number (56616 = T₃₃₆).

The spelling of 1213644480 in words is "one billion, two hundred thirteen million, six hundred forty-four thousand, four hundred eighty".