1650538240 has 72 divisors (see below), whose sum is σ = 4257717408. Its totient is φ = 609423360.

The previous prime is 1650538147. The next prime is 1650538247. The reversal of 1650538240 is 428350561.

It is a junction number, because it is equal to n+sod(n) for n = 1650538196 and 1650538205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650538247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32956 + ... + 66235.

It is an arithmetic number, because the mean of its divisors is an integer number (59134964).

Almost surely, 2^1650538240 is an apocalyptic number.

1650538240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1650538240 is an abundant number, since it is smaller than the sum of its proper divisors (2607179168).

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

1650538240 is an equidigital number, since it uses as much as digits as its factorization.

1650538240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99225 (or 99211 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 1650538240 is about 40626.8167593771. The cubic root of 1650538240 is about 1181.7942253419.

It can be divided in two parts, 16505 and 38240, that added together give a palindrome (54745).

The spelling of 1650538240 in words is "one billion, six hundred fifty million, five hundred thirty-eight thousand, two hundred forty".