2015622420 has 192 divisors, whose sum is σ = 6642155520. Its totient is φ = 447132672.

The previous prime is 2015622419. The next prime is 2015622431. The reversal of 2015622420 is 242265102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4207741 + ... + 4208219.

It is an arithmetic number, because the mean of its divisors is an integer number (34594560).

Almost surely, 2^2015622420 is an apocalyptic number.

2015622420 is a gapful number since it is divisible by the number (20) 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 2015622420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3321077760).

2015622420 is an abundant number, since it is smaller than the sum of its proper divisors (4626533100).

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

2015622420 is a wasteful number, since it uses less digits than its factorization.

2015622420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 772 counting only the distinct ones).

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

The square root of 2015622420 is about 44895.6837569047. The cubic root of 2015622420 is about 1263.1930478393.

Adding to 2015622420 its reverse (242265102), we get a palindrome (2257887522).

The spelling of 2015622420 in words is "two billion, fifteen million, six hundred twenty-two thousand, four hundred twenty".