1213417680 has 80 divisors (see below), whose sum is σ = 3813178560. Its totient is φ = 319140864.

The previous prime is 1213417679. The next prime is 1213417697. The reversal of 1213417680 is 867143121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1213417680² = 2944764932273164800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17110 + ... + 52149.

It is an arithmetic number, because the mean of its divisors is an integer number (47664732).

Almost surely, 2^1213417680 is an apocalyptic number.

1213417680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213417680 is an abundant number, since it is smaller than the sum of its proper divisors (2599760880).

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

1213417680 is a wasteful number, since it uses less digits than its factorization.

1213417680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69348 (or 69342 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 1213417680 is about 34834.1453174898. The cubic root of 1213417680 is about 1066.6045684335.

The spelling of 1213417680 in words is "one billion, two hundred thirteen million, four hundred seventeen thousand, six hundred eighty".