475811640 has 96 divisors (see below), whose sum is σ = 1637372880. Its totient is φ = 119417856.

The previous prime is 475811639. The next prime is 475811659. The reversal of 475811640 is 46118574.

It is a happy number.

475811640 is a `hidden beast` number, since 4 + 7 + 5 + 8 + 1 + 1 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 475811595 and 475811604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32754 + ... + 44993.

Almost surely, 2^475811640 is an apocalyptic number.

475811640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

475811640 is an abundant number, since it is smaller than the sum of its proper divisors (1161561240).

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

475811640 is a wasteful number, since it uses less digits than its factorization.

475811640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77781 (or 77774 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 475811640 is about 21813.1070689162. The cubic root of 475811640 is about 780.6895283370.

The spelling of 475811640 in words is "four hundred seventy-five million, eight hundred eleven thousand, six hundred forty".