1016781808 has 40 divisors (see below), whose sum is σ = 2369947520. Its totient is φ = 412827840.

The previous prime is 1016781791. The next prime is 1016781817. The reversal of 1016781808 is 8081876101.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236778 + ... + 241033.

It is an arithmetic number, because the mean of its divisors is an integer number (59248688).

Almost surely, 2^1016781808 is an apocalyptic number.

It is an amenable number.

1016781808 is an abundant number, since it is smaller than the sum of its proper divisors (1353165712).

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

1016781808 is a wasteful number, since it uses less digits than its factorization.

1016781808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477845 (or 477839 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 40.

The square root of 1016781808 is about 31887.0162919016. The cubic root of 1016781808 is about 1005.5629323992.

The spelling of 1016781808 in words is "one billion, sixteen million, seven hundred eighty-one thousand, eight hundred eight".