Search a number
-
+
490808680 = 23512270217
BaseRepresentation
bin11101010000010…
…010010101101000
31021012112122221021
4131100102111220
52001121334210
6120411422224
715106543045
oct3520222550
91235478837
10490808680
1123205990a
12118454974
137a8b764b
14492821cc
152d14ebda
hex1d412568

490808680 has 16 divisors (see below), whose sum is σ = 1104319620. Its totient is φ = 196323456.

The previous prime is 490808677. The next prime is 490808713. The reversal of 490808680 is 86808094.

It can be written as a sum of positive squares in 2 ways, for example, as 489205924 + 1602756 = 22118^2 + 1266^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6135069 + ... + 6135148.

Almost surely, 2490808680 is an apocalyptic number.

490808680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

490808680 is an abundant number, since it is smaller than the sum of its proper divisors (613510940).

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

490808680 is a wasteful number, since it uses less digits than its factorization.

490808680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12270228 (or 12270224 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 490808680 is about 22154.2023101713. The cubic root of 490808680 is about 788.8069799094.

The spelling of 490808680 in words is "four hundred ninety million, eight hundred eight thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 12270217 24540434 49080868 61351085 98161736 122702170 245404340 490808680