649088 has 32 divisors (see below), whose sum is σ = 1413720. Its totient is φ = 294400.

The previous prime is 649087. The next prime is 649093. The reversal of 649088 is 880946.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1178 + ... + 1638.

2⁶⁴⁹⁰⁸⁸ 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 649088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (706860).

649088 is an abundant number, since it is smaller than the sum of its proper divisors (764632).

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

649088 is a wasteful number, since it uses less digits than its factorization.

649088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 649088 is about 805.6599779063. The cubic root of 649088 is about 86.5833782349.

It can be divided in two parts, 6 and 49088, that multiplied together give a triangular number (294528 = T₇₆₇).

The spelling of 649088 in words is "six hundred forty-nine thousand, eighty-eight".