19228620 has 24 divisors (see below), whose sum is σ = 53840304. Its totient is φ = 5127616.

The previous prime is 19228619. The next prime is 19228637. The reversal of 19228620 is 2682291.

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

It is a plaindrome in base 16.

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 7 ways as a sum of consecutive naturals, for example, 160179 + ... + 160298.

It is an arithmetic number, because the mean of its divisors is an integer number (2243346).

Almost surely, 2^19228620 is an apocalyptic number.

19228620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19228620 is an abundant number, since it is smaller than the sum of its proper divisors (34611684).

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

19228620 is a wasteful number, since it uses less digits than its factorization.

19228620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320489 (or 320487 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 19228620 is about 4385.0450396775. The cubic root of 19228620 is about 267.9061637773.

The spelling of 19228620 in words is "nineteen million, two hundred twenty-eight thousand, six hundred twenty".