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386949 = 3128983
BaseRepresentation
bin1011110011110000101
3201122210110
41132132011
544340244
612143233
73201063
oct1363605
9648713
10386949
112447a2
12167b19
13107184
14a1033
15799b9
hex5e785

386949 has 4 divisors (see below), whose sum is σ = 515936. Its totient is φ = 257964.

The previous prime is 386927. The next prime is 386963. The reversal of 386949 is 949683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 386949 - 28 = 386693 is a prime.

It is a D-number.

It is a Duffinian number.

386949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64489 + ... + 64494.

It is an arithmetic number, because the mean of its divisors is an integer number (128984).

2386949 is an apocalyptic number.

It is an amenable number.

386949 is a deficient number, since it is larger than the sum of its proper divisors (128987).

386949 is a wasteful number, since it uses less digits than its factorization.

386949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128986.

The product of its digits is 46656, while the sum is 39.

The square root of 386949 is about 622.0522486094. The cubic root of 386949 is about 72.8704150040.

The spelling of 386949 in words is "three hundred eighty-six thousand, nine hundred forty-nine".

Divisors: 1 3 128983 386949