817900384 has 24 divisors (see below), whose sum is σ = 1840276368. Its totient is φ = 350528640.

The previous prime is 817900381. The next prime is 817900469. The reversal of 817900384 is 483009718.

It is a super-2 number, since 2×817900384² = 1337922076294694912, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (817900381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1825447 + ... + 1825894.

It is an arithmetic number, because the mean of its divisors is an integer number (76678182).

Almost surely, 2^817900384 is an apocalyptic number.

It is an amenable number.

817900384 is an abundant number, since it is smaller than the sum of its proper divisors (1022375984).

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

817900384 is a wasteful number, since it uses less digits than its factorization.

817900384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651358 (or 3651350 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 817900384 is about 28598.9577432465. The cubic root of 817900384 is about 935.1906096187.

The spelling of 817900384 in words is "eight hundred seventeen million, nine hundred thousand, three hundred eighty-four".