Search a number
-
+
1213703268890 = 25745493811523
BaseRepresentation
bin10001101010010110010…
…110100010101000011010
311022000210001211021222212
4101222112112202220122
5124341131014101030
62325322333115122
7153454461365210
oct21522626425032
94260701737885
101213703268890
11428801943902
12177282928aa2
138a5b45a1938
1442a5a43ccb0
1521887c58595
hex11a965a2a1a

1213703268890 has 32 divisors (see below), whose sum is σ = 2497310524800. Its totient is φ = 416035249344.

The previous prime is 1213703268871. The next prime is 1213703268913. The reversal of 1213703268890 is 988623073121.

It is a Curzon 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, 1587332 + ... + 2224191.

It is an arithmetic number, because the mean of its divisors is an integer number (78040953900).

Almost surely, 21213703268890 is an apocalyptic number.

1213703268890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213703268890 is an abundant number, since it is smaller than the sum of its proper divisors (1283607255910).

1213703268890 is a wasteful number, since it uses less digits than its factorization.

1213703268890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3816086.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 1213703268890 in words is "one trillion, two hundred thirteen billion, seven hundred three million, two hundred sixty-eight thousand, eight hundred ninety".

Divisors: 1 2 5 7 10 14 35 70 4549 9098 22745 31843 45490 63686 159215 318430 3811523 7623046 19057615 26680661 38115230 53361322 133403305 266806610 17338618127 34677236254 86693090635 121370326889 173386181270 242740653778 606851634445 1213703268890