817434492 has 96 divisors (see below), whose sum is σ = 2305228800. Its totient is φ = 220231872.

The previous prime is 817434487. The next prime is 817434521. The reversal of 817434492 is 294434718.

It is a super-2 number, since 2×817434492² = 1336398297422596128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 380373 + ... + 382515.

It is an arithmetic number, because the mean of its divisors is an integer number (24012800).

Almost surely, 2^817434492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 817434492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1152614400).

817434492 is an abundant number, since it is smaller than the sum of its proper divisors (1487794308).

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

817434492 is a wasteful number, since it uses less digits than its factorization.

817434492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415 (or 2413 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 817434492 is about 28590.8113211220. The cubic root of 817434492 is about 935.0130082932.

The spelling of 817434492 in words is "eight hundred seventeen million, four hundred thirty-four thousand, four hundred ninety-two".