1622019420 has 288 divisors, whose sum is σ = 5808112128. Its totient is φ = 358765056.

The previous prime is 1622019277. The next prime is 1622019433. The reversal of 1622019420 is 249102261.

1622019420 is a `hidden beast` number, since 1 + 6 + 220 + 19 + 420 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7145347 + ... + 7145573.

It is an arithmetic number, because the mean of its divisors is an integer number (20167056).

Almost surely, 2^1622019420 is an apocalyptic number.

1622019420 is a gapful number since it is divisible by the number (10) 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 1622019420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2904056064).

1622019420 is an abundant number, since it is smaller than the sum of its proper divisors (4186092708).

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

1622019420 is a wasteful number, since it uses less digits than its factorization.

1622019420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1622019420 is about 40274.3022285924. The cubic root of 1622019420 is about 1174.9480997145.

The spelling of 1622019420 in words is "one billion, six hundred twenty-two million, nineteen thousand, four hundred twenty".