649432 has 16 divisors (see below), whose sum is σ = 1391760. Its totient is φ = 278304.

The previous prime is 649427. The next prime is 649457. The reversal of 649432 is 234946.

649432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 649432.

It is a congruent number.

It is an unprimeable number.

649432 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 3 ways as a sum of consecutive naturals, for example, 5743 + ... + 5854.

It is an arithmetic number, because the mean of its divisors is an integer number (86985).

2⁶⁴⁹⁴³² is an apocalyptic number.

It is an amenable number.

649432 is an abundant number, since it is smaller than the sum of its proper divisors (742328).

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

649432 is a wasteful number, since it uses less digits than its factorization.

649432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11610 (or 11606 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 649432 is about 805.8734391950. The cubic root of 649432 is about 86.5986711905.

It can be divided in two parts, 649 and 432, that added together give a triangular number (1081 = T₄₆).

The spelling of 649432 in words is "six hundred forty-nine thousand, four hundred thirty-two".