1356851808 has 72 divisors (see below), whose sum is σ = 4155370128. Its totient is φ = 417491712.

The previous prime is 1356851791. The next prime is 1356851809. The reversal of 1356851808 is 8081586531.

1356851808 is a `hidden beast` number, since 1 + 3 + 568 + 5 + 1 + 80 + 8 = 666.

1356851808 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356851809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177460 + ... + 184947.

It is an arithmetic number, because the mean of its divisors is an integer number (57713474).

Almost surely, 2^1356851808 is an apocalyptic number.

1356851808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1356851808 is an abundant number, since it is smaller than the sum of its proper divisors (2798518320).

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

1356851808 is a wasteful number, since it uses less digits than its factorization.

1356851808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362436 (or 362425 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The square root of 1356851808 is about 36835.4694282562. The cubic root of 1356851808 is about 1107.0760934075.

The spelling of 1356851808 in words is "one billion, three hundred fifty-six million, eight hundred fifty-one thousand, eight hundred eight".