817999470 has 24 divisors (see below), whose sum is σ = 2126798856. Its totient is φ = 218133168.

The previous prime is 817999411. The next prime is 817999471. The reversal of 817999470 is 74999718.

817999470 is a `hidden beast` number, since 81 + 7 + 9 + 99 + 470 = 666.

817999470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (817999471) 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, 4544352 + ... + 4544531.

It is an arithmetic number, because the mean of its divisors is an integer number (88616619).

Almost surely, 2^817999470 is an apocalyptic number.

817999470 is an abundant number, since it is smaller than the sum of its proper divisors (1308799386).

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

817999470 is a wasteful number, since it uses less digits than its factorization.

817999470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9088896 (or 9088893 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 817999470 is about 28600.6900266410. The cubic root of 817999470 is about 935.2283732049.

The spelling of 817999470 in words is "eight hundred seventeen million, nine hundred ninety-nine thousand, four hundred seventy".