3640353420 has 96 divisors (see below), whose sum is σ = 11130255360. Its totient is φ = 881666560.

The previous prime is 3640353419. The next prime is 3640353433. The reversal of 3640353420 is 243530463.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 947824 + ... + 951656.

It is an arithmetic number, because the mean of its divisors is an integer number (115940160).

Almost surely, 2^3640353420 is an apocalyptic number.

3640353420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3640353420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5565127680).

3640353420 is an abundant number, since it is smaller than the sum of its proper divisors (7489901940).

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

3640353420 is a wasteful number, since it uses less digits than its factorization.

3640353420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5295 (or 5293 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 30.

The square root of 3640353420 is about 60335.3413846313. The cubic root of 3640353420 is about 1538.3241200169.

Adding to 3640353420 its reverse (243530463), we get a palindrome (3883883883).

The spelling of 3640353420 in words is "three billion, six hundred forty million, three hundred fifty-three thousand, four hundred twenty".