649392 has 40 divisors (see below), whose sum is σ = 1708224. Its totient is φ = 212544.

The previous prime is 649381. The next prime is 649403. The reversal of 649392 is 293946.

It is an interprime number because it is at equal distance from previous prime (649381) and next prime (649403).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649392.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3903 + ... + 4065.

2⁶⁴⁹³⁹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (854112).

649392 is an abundant number, since it is smaller than the sum of its proper divisors (1058832).

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

649392 is a wasteful number, since it uses less digits than its factorization.

649392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 251 counting only the distinct ones).

The product of its digits is 11664, while the sum is 33.

The square root of 649392 is about 805.8486210201. The cubic root of 649392 is about 86.5968932174.

The spelling of 649392 in words is "six hundred forty-nine thousand, three hundred ninety-two".