498998640 has 80 divisors (see below), whose sum is σ = 1767886848. Its totient is φ = 114056448.

The previous prime is 498998627. The next prime is 498998663. The reversal of 498998640 is 46899894.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146832 + ... + 150191.

Almost surely, 2^498998640 is an apocalyptic number.

498998640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

498998640 is an abundant number, since it is smaller than the sum of its proper divisors (1268888208).

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

498998640 is a wasteful number, since it uses less digits than its factorization.

498998640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297046 (or 297040 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 57.

The square root of 498998640 is about 22338.2774626872. The cubic root of 498998640 is about 793.1703185683.

The spelling of 498998640 in words is "four hundred ninety-eight million, nine hundred ninety-eight thousand, six hundred forty".