491204280 has 64 divisors (see below), whose sum is σ = 1684131840. Its totient is φ = 112275072.

The previous prime is 491204279. The next prime is 491204297. The reversal of 491204280 is 82402194.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 291544 + ... + 293223.

It is an arithmetic number, because the mean of its divisors is an integer number (26314560).

Almost surely, 2^491204280 is an apocalyptic number.

491204280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491204280 is an abundant number, since it is smaller than the sum of its proper divisors (1192927560).

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

491204280 is a wasteful number, since it uses less digits than its factorization.

491204280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584788 (or 584784 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 491204280 is about 22163.1288404864. The cubic root of 491204280 is about 789.0188535319.

The spelling of 491204280 in words is "four hundred ninety-one million, two hundred four thousand, two hundred eighty".