1236820216 has 16 divisors (see below), whose sum is σ = 2419866000. Its totient is φ = 591522624.

The previous prime is 1236820199. The next prime is 1236820229. The reversal of 1236820216 is 6120286321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3360741 + ... + 3361108.

It is an arithmetic number, because the mean of its divisors is an integer number (151241625).

Almost surely, 2^1236820216 is an apocalyptic number.

It is an amenable number.

1236820216 is a deficient number, since it is larger than the sum of its proper divisors (1183045784).

1236820216 is a wasteful number, since it uses less digits than its factorization.

1236820216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6721878 (or 6721874 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 1236820216 is about 35168.4548423726. The cubic root of 1236820216 is about 1073.4179623698.

The spelling of 1236820216 in words is "one billion, two hundred thirty-six million, eight hundred twenty thousand, two hundred sixteen".