Search a number
-
+
840628644 = 223220731741
BaseRepresentation
bin110010000110101…
…111100110100100
32011120210100201020
4302012233212210
53210200104034
6215225331140
726555140242
oct6206574644
92146710636
10840628644
113a1570819
121b5636ab0
131052098cb
147d903792
154dc00249
hex321af9a4

840628644 has 24 divisors (see below), whose sum is σ = 1962417408. Its totient is φ = 280073760.

The previous prime is 840628573. The next prime is 840628661. The reversal of 840628644 is 446826048.

840628644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8406286442 = 1413313034226557472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 840628596 and 840628605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10614 + ... + 42354.

It is an arithmetic number, because the mean of its divisors is an integer number (81767392).

Almost surely, 2840628644 is an apocalyptic number.

It is an amenable number.

840628644 is an abundant number, since it is smaller than the sum of its proper divisors (1121788764).

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

840628644 is a wasteful number, since it uses less digits than its factorization.

840628644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33955 (or 33953 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 42.

The square root of 840628644 is about 28993.5966033881. The cubic root of 840628644 is about 943.7741143554.

The spelling of 840628644 in words is "eight hundred forty million, six hundred twenty-eight thousand, six hundred forty-four".

Divisors: 1 2 3 4 6 12 2207 4414 6621 8828 13242 26484 31741 63482 95223 126964 190446 380892 70052387 140104774 210157161 280209548 420314322 840628644