855507772 has 24 divisors (see below), whose sum is σ = 1770017760. Its totient is φ = 354002880.

The previous prime is 855507733. The next prime is 855507773. The reversal of 855507772 is 277705558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855507773) 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, 525979 + ... + 527602.

It is an arithmetic number, because the mean of its divisors is an integer number (73750740).

Almost surely, 2^855507772 is an apocalyptic number.

It is an amenable number.

855507772 is an abundant number, since it is smaller than the sum of its proper divisors (914509988).

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

855507772 is a wasteful number, since it uses less digits than its factorization.

855507772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053621 (or 1053619 counting only the distinct ones).

The product of its (nonzero) digits is 686000, while the sum is 46.

The square root of 855507772 is about 29249.0644636713. The cubic root of 855507772 is about 949.3098485126.

The spelling of 855507772 in words is "eight hundred fifty-five million, five hundred seven thousand, seven hundred seventy-two".