649796 has 24 divisors (see below), whose sum is σ = 1357440. Its totient is φ = 266112.

The previous prime is 649793. The next prime is 649799. The reversal of 649796 is 697946.

649796 = 79² + 80² + ... + 134².

It is an interprime number because it is at equal distance from previous prime (649793) and next prime (649799).

It is not an unprimeable number, because it can be changed into a prime (649793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140 + ... + 1148.

It is an arithmetic number, because the mean of its divisors is an integer number (56560).

2⁶⁴⁹⁷⁹⁶ 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 649796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (678720).

649796 is an abundant number, since it is smaller than the sum of its proper divisors (707644).

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

649796 is a wasteful number, since it uses less digits than its factorization.

649796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043 (or 1041 counting only the distinct ones).

The product of its digits is 81648, while the sum is 41.

The square root of 649796 is about 806.0992494724. The cubic root of 649796 is about 86.6148473922.

The spelling of 649796 in words is "six hundred forty-nine thousand, seven hundred ninety-six".