497809920 has 160 divisors (see below), whose sum is σ = 1622788992. Its totient is φ = 130138112.

The previous prime is 497809909. The next prime is 497809943. The reversal of 497809920 is 29908794.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 497809920.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406429 + ... + 407651.

Almost surely, 2^497809920 is an apocalyptic number.

497809920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 497809920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (811394496).

497809920 is an abundant number, since it is smaller than the sum of its proper divisors (1124979072).

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

497809920 is a wasteful number, since it uses less digits than its factorization.

497809920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302 (or 1286 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 497809920 is about 22311.6543537229. The cubic root of 497809920 is about 792.5399847805.

The spelling of 497809920 in words is "four hundred ninety-seven million, eight hundred nine thousand, nine hundred twenty".