[go: up one dir, main page]

Search a number
-
+
191403440 = 2454215683
BaseRepresentation
bin10110110100010…
…01010110110000
3111100011022011022
423122021112300
5342444402230
630554235012
74512621344
oct1332112660
9440138138
10191403440
1199051268
1254125a68
1330867497
141b5c5624
1511c0c1e5
hexb6895b0

191403440 has 40 divisors (see below), whose sum is σ = 446148528. Its totient is φ = 76366080.

The previous prime is 191403439. The next prime is 191403469. The reversal of 191403440 is 44304191.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30839 + ... + 36521.

Almost surely, 2191403440 is an apocalyptic number.

191403440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191403440 is an abundant number, since it is smaller than the sum of its proper divisors (254745088).

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

191403440 is a wasteful number, since it uses less digits than its factorization.

191403440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117 (or 6111 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 191403440 is about 13834.8632085756. The cubic root of 191403440 is about 576.3017162865.

The spelling of 191403440 in words is "one hundred ninety-one million, four hundred three thousand, four hundred forty".

Divisors: 1 2 4 5 8 10 16 20 40 80 421 842 1684 2105 3368 4210 5683 6736 8420 11366 16840 22732 28415 33680 45464 56830 90928 113660 227320 454640 2392543 4785086 9570172 11962715 19140344 23925430 38280688 47850860 95701720 191403440