1215680700 has 72 divisors (see below), whose sum is σ = 3787948528. Its totient is φ = 299243520.

The previous prime is 1215680699. The next prime is 1215680701. The reversal of 1215680700 is 70865121.

It is an interprime number because it is at equal distance from previous prime (1215680699) and next prime (1215680701).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215680701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151957 + ... + 159756.

Almost surely, 2^1215680700 is an apocalyptic number.

1215680700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215680700 is an abundant number, since it is smaller than the sum of its proper divisors (2572267828).

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

1215680700 is a wasteful number, since it uses less digits than its factorization.

1215680700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311743 (or 311736 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 1215680700 is about 34866.6129700033. The cubic root of 1215680700 is about 1067.2672279940.

The spelling of 1215680700 in words is "one billion, two hundred fifteen million, six hundred eighty thousand, seven hundred".