1208617620 has 48 divisors (see below), whose sum is σ = 3867577728. Its totient is φ = 276255360.

The previous prime is 1208617561. The next prime is 1208617621. The reversal of 1208617620 is 267168021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1208617621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1438411 + ... + 1439250.

It is an arithmetic number, because the mean of its divisors is an integer number (80574536).

Almost surely, 2^1208617620 is an apocalyptic number.

1208617620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1208617620 is an abundant number, since it is smaller than the sum of its proper divisors (2658960108).

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

1208617620 is a wasteful number, since it uses less digits than its factorization.

1208617620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877680 (or 2877678 counting only the distinct ones).

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

The square root of 1208617620 is about 34765.1782679163. The cubic root of 1208617620 is about 1065.1962784880.

It can be divided in two parts, 1208 and 617620, that added together give a triangular number (618828 = T₁₁₁₂).

The spelling of 1208617620 in words is "one billion, two hundred eight million, six hundred seventeen thousand, six hundred twenty".