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645464 = 2380683
BaseRepresentation
bin10011101100101011000
31012210102002
42131211120
5131123324
621500132
75325551
oct2354530
91183362
10645464
11400a46
12271648
13197a41
1412b328
15cb3ae
hex9d958

645464 has 8 divisors (see below), whose sum is σ = 1210260. Its totient is φ = 322728.

The previous prime is 645443. The next prime is 645467. The reversal of 645464 is 464546.

645464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 645464.

It is not an unprimeable number, because it can be changed into a prime (645467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40334 + ... + 40349.

2645464 is an apocalyptic number.

It is an amenable number.

645464 is a deficient number, since it is larger than the sum of its proper divisors (564796).

645464 is a wasteful number, since it uses less digits than its factorization.

645464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80689 (or 80685 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 645464 is about 803.4077420588. The cubic root of 645464 is about 86.4219394445.

The spelling of 645464 in words is "six hundred forty-five thousand, four hundred sixty-four".

Divisors: 1 2 4 8 80683 161366 322732 645464