491873040 has 80 divisors (see below), whose sum is σ = 1694236800. Its totient is φ = 131165568.

The previous prime is 491873003. The next prime is 491873069. The reversal of 491873040 is 40378194.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 491872986 and 491873004.

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, 111700 + ... + 116019.

It is an arithmetic number, because the mean of its divisors is an integer number (21177960).

Almost surely, 2^491873040 is an apocalyptic number.

491873040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491873040 is an abundant number, since it is smaller than the sum of its proper divisors (1202363760).

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

491873040 is a wasteful number, since it uses less digits than its factorization.

491873040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227741 (or 227729 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 491873040 is about 22178.2109287472. The cubic root of 491873040 is about 789.3767663763.

The spelling of 491873040 in words is "four hundred ninety-one million, eight hundred seventy-three thousand, forty".