497991408 has 80 divisors (see below), whose sum is σ = 1310332800. Its totient is φ = 162950400.

The previous prime is 497991359. The next prime is 497991413. The reversal of 497991408 is 804199794.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673503 + ... + 674241.

It is an arithmetic number, because the mean of its divisors is an integer number (16379160).

Almost surely, 2^497991408 is an apocalyptic number.

497991408 is a gapful number since it is divisible by the number (48) 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 497991408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (655166400).

497991408 is an abundant number, since it is smaller than the sum of its proper divisors (812341392).

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

497991408 is a wasteful number, since it uses less digits than its factorization.

497991408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 497991408 is about 22315.7210952279. The cubic root of 497991408 is about 792.6362859421.

The spelling of 497991408 in words is "four hundred ninety-seven million, nine hundred ninety-one thousand, four hundred eight".