650212440 has 64 divisors (see below), whose sum is σ = 1998228960. Its totient is φ = 169159680.

The previous prime is 650212403. The next prime is 650212463. The reversal of 650212440 is 44212056.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 650212440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61159 + ... + 70998.

Almost surely, 2^650212440 is an apocalyptic number.

650212440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

650212440 is an abundant number, since it is smaller than the sum of its proper divisors (1348016520).

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

650212440 is a wasteful number, since it uses less digits than its factorization.

650212440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132212 (or 132208 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 650212440 is about 25499.2635187764. The cubic root of 650212440 is about 866.3334662593. Note that the first 3 decimals are identical.

Adding to 650212440 its reverse (44212056), we get a palindrome (694424496).

The spelling of 650212440 in words is "six hundred fifty million, two hundred twelve thousand, four hundred forty".