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390486 = 23151431
BaseRepresentation
bin1011111010101010110
3201211122110
41133111112
544443421
612211450
73214305
oct1372526
9654573
10390486
11247418
12169b86
13108975
14a243c
157aa76
hex5f556

390486 has 16 divisors (see below), whose sum is σ = 787968. Its totient is φ = 129000.

The previous prime is 390479. The next prime is 390487. The reversal of 390486 is 684093.

It is a super-3 number, since 3×3904863 = 178623114792333768, which contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390487) by changing a digit.

390486 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691 + ... + 1121.

It is an arithmetic number, because the mean of its divisors is an integer number (49248).

2390486 is an apocalyptic number.

390486 is an abundant number, since it is smaller than the sum of its proper divisors (397482).

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

390486 is a wasteful number, since it uses less digits than its factorization.

390486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 390486 is about 624.8887901059. Note that the first 3 decimals coincide. The cubic root of 390486 is about 73.0917717394.

The spelling of 390486 in words is "three hundred ninety thousand, four hundred eighty-six".

Divisors: 1 2 3 6 151 302 431 453 862 906 1293 2586 65081 130162 195243 390486