646762 has 4 divisors (see below), whose sum is σ = 970146. Its totient is φ = 323380.

The previous prime is 646757. The next prime is 646771. The reversal of 646762 is 267646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 385641 + 261121 = 621^2 + 511^2 .

It is a nialpdrome in base 15.

It is an unprimeable number.

646762 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 as a sum of consecutive naturals, namely, 161689 + ... + 161692.

2⁶⁴⁶⁷⁶² is an apocalyptic number.

646762 is a deficient number, since it is larger than the sum of its proper divisors (323384).

646762 is a wasteful number, since it uses less digits than its factorization.

646762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323383.

The product of its digits is 12096, while the sum is 31.

The square root of 646762 is about 804.2151453436. The cubic root of 646762 is about 86.4798309085.

The spelling of 646762 in words is "six hundred forty-six thousand, seven hundred sixty-two".