494979840 has 108 divisors (see below), whose sum is σ = 1712618544. Its totient is φ = 131991552.

The previous prime is 494979829. The next prime is 494979857. The reversal of 494979840 is 48979494.

It is a happy number.

494979840 is a `hidden beast` number, since 494 + 9 + 79 + 84 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9964 + ... + 33003.

Almost surely, 2^494979840 is an apocalyptic number.

494979840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

494979840 is an abundant number, since it is smaller than the sum of its proper divisors (1217638704).

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

494979840 is a wasteful number, since it uses less digits than its factorization.

494979840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42994 (or 42977 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 494979840 is about 22248.1423943663. The cubic root of 494979840 is about 791.0352501521.

The spelling of 494979840 in words is "four hundred ninety-four million, nine hundred seventy-nine thousand, eight hundred forty".