498256640 has 72 divisors (see below), whose sum is σ = 1364002080. Its totient is φ = 170827776.

The previous prime is 498256579. The next prime is 498256651. The reversal of 498256640 is 46652894.

It is a junction number, because it is equal to n+sod(n) for n = 498256591 and 498256600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18845 + ... + 36764.

Almost surely, 2^498256640 is an apocalyptic number.

498256640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

498256640 is an abundant number, since it is smaller than the sum of its proper divisors (865745440).

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

498256640 is an equidigital number, since it uses as much as digits as its factorization.

498256640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55637 (or 55623 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 498256640 is about 22321.6630204830. The cubic root of 498256640 is about 792.7769812710.

It can be divided in two parts, 49825 and 6640, that added together give a palindrome (56465).

The spelling of 498256640 in words is "four hundred ninety-eight million, two hundred fifty-six thousand, six hundred forty".