1213652620 has 24 divisors (see below), whose sum is σ = 2556878688. Its totient is φ = 483897600.

The previous prime is 1213652599. The next prime is 1213652621. The reversal of 1213652620 is 262563121.

It is not an unprimeable number, because it can be changed into a prime (1213652621) 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, 91341 + ... + 103780.

It is an arithmetic number, because the mean of its divisors is an integer number (106536612).

Almost surely, 2^1213652620 is an apocalyptic number.

1213652620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213652620 is an abundant number, since it is smaller than the sum of its proper divisors (1343226068).

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

1213652620 is a wasteful number, since it uses less digits than its factorization.

1213652620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195441 (or 195439 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1213652620 is about 34837.5174201607. The cubic root of 1213652620 is about 1066.6734020842.

The spelling of 1213652620 in words is "one billion, two hundred thirteen million, six hundred fifty-two thousand, six hundred twenty".