491536280 has 32 divisors (see below), whose sum is σ = 1112756400. Its totient is φ = 195405696.

The previous prime is 491536267. The next prime is 491536301. The reversal of 491536280 is 82635194.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31175 + ... + 44214.

Almost surely, 2^491536280 is an apocalyptic number.

491536280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491536280 is an abundant number, since it is smaller than the sum of its proper divisors (621220120).

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

491536280 is a wasteful number, since it uses less digits than its factorization.

491536280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75563 (or 75559 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 491536280 is about 22170.6174925283. The cubic root of 491536280 is about 789.1965767826.

The spelling of 491536280 in words is "four hundred ninety-one million, five hundred thirty-six thousand, two hundred eighty".