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6920380 = 2252291511
BaseRepresentation
bin11010011001100010111100
3111000120222101
4122121202330
53232423010
6404154444
7112552015
oct32314274
914016871
106920380
1139a7425
122398a24
131583bcc
14cc200c
1591a73a
hex6998bc

6920380 has 24 divisors (see below), whose sum is σ = 14605920. Its totient is φ = 2754240.

The previous prime is 6920371. The next prime is 6920383. The reversal of 6920380 is 830296.

It is a super-4 number, since 4×69203804 (a number of 28 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6920383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3825 + ... + 5335.

It is an arithmetic number, because the mean of its divisors is an integer number (608580).

Almost surely, 26920380 is an apocalyptic number.

It is an amenable number.

6920380 is an abundant number, since it is smaller than the sum of its proper divisors (7685540).

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

6920380 is a wasteful number, since it uses less digits than its factorization.

6920380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749 (or 1747 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 6920380 is about 2630.6615137642. The cubic root of 6920380 is about 190.5650767486.

It can be divided in two parts, 69 and 20380, that added together give a square (20449 = 1432).

The spelling of 6920380 in words is "six million, nine hundred twenty thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 229 458 916 1145 1511 2290 3022 4580 6044 7555 15110 30220 346019 692038 1384076 1730095 3460190 6920380