491470280 has 128 divisors (see below), whose sum is σ = 1337333760. Its totient is φ = 158976000.

The previous prime is 491470277. The next prime is 491470303. The reversal of 491470280 is 82074194.

It is a super-2 number, since 2×491470280² = 483086072246556800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a cake number, because a cake can be divided into 491470280 parts by 1434 planar cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 491470280.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355190 + ... + 356570.

It is an arithmetic number, because the mean of its divisors is an integer number (10447920).

Almost surely, 2^491470280 is an apocalyptic number.

491470280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491470280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668666880).

491470280 is an abundant number, since it is smaller than the sum of its proper divisors (845863480).

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

491470280 is a wasteful number, since it uses less digits than its factorization.

491470280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471 (or 1467 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 491470280 is about 22169.1289860472. The cubic root of 491470280 is about 789.1612526314.

The spelling of 491470280 in words is "four hundred ninety-one million, four hundred seventy thousand, two hundred eighty".