472785381 has 6 divisors (see below), whose sum is σ = 682912230. Its totient is φ = 315190248.

The previous prime is 472785377. The next prime is 472785389. The reversal of 472785381 is 183587274.

472785381 is a `hidden beast` number, since 47 + 2 + 78 + 538 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 342620100 + 130165281 = 18510^2 + 11409^2 .

It is not a de Polignac number, because 472785381 - 2² = 472785377 is a prime.

It is a super-2 number, since 2×472785381² = 447052032974630322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (472785389) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26265846 + ... + 26265863.

It is an arithmetic number, because the mean of its divisors is an integer number (113818705).

Almost surely, 2^472785381 is an apocalyptic number.

It is an amenable number.

472785381 is a deficient number, since it is larger than the sum of its proper divisors (210126849).

472785381 is a wasteful number, since it uses less digits than its factorization.

472785381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52531715 (or 52531712 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 472785381 is about 21743.6285150386. The cubic root of 472785381 is about 779.0308920951.

The spelling of 472785381 in words is "four hundred seventy-two million, seven hundred eighty-five thousand, three hundred eighty-one".