Search a number
-
+
213880680 = 2332513231987
BaseRepresentation
bin11001011111110…
…00111101101000
3112220110021010200
430233320331220
5414223140210
633120112200
75204645556
oct1457707550
9486407120
10213880680
11aa8037a2
125b765660
1335407320
1420596bd6
1513b9c0c0
hexcbf8f68

213880680 has 192 divisors, whose sum is σ = 781522560. Its totient is φ = 50333184.

The previous prime is 213880679. The next prime is 213880721. The reversal of 213880680 is 86088312.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106647 + ... + 108633.

It is an arithmetic number, because the mean of its divisors is an integer number (4070430).

Almost surely, 2213880680 is an apocalyptic number.

213880680 is a gapful number since it is divisible by the number (20) 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 213880680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390761280).

213880680 is an abundant number, since it is smaller than the sum of its proper divisors (567641880).

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

213880680 is a wasteful number, since it uses less digits than its factorization.

213880680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040 (or 2033 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 213880680 is about 14624.6599960478. The cubic root of 213880680 is about 598.0312135324.

The spelling of 213880680 in words is "two hundred thirteen million, eight hundred eighty thousand, six hundred eighty".