1213648700 has 72 divisors (see below), whose sum is σ = 3042086544. Its totient is φ = 415360000.

The previous prime is 1213648699. The next prime is 1213648721. The reversal of 1213648700 is 78463121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13751 + ... + 51150.

It is an arithmetic number, because the mean of its divisors is an integer number (42251202).

Almost surely, 2^1213648700 is an apocalyptic number.

1213648700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213648700 is an abundant number, since it is smaller than the sum of its proper divisors (1828437844).

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

1213648700 is a wasteful number, since it uses less digits than its factorization.

1213648700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64943 (or 64936 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1213648700 is about 34837.4611589306. The cubic root of 1213648700 is about 1066.6722536600.

The spelling of 1213648700 in words is "one billion, two hundred thirteen million, six hundred forty-eight thousand, seven hundred".