19628090 has 8 divisors (see below), whose sum is σ = 35330580. Its totient is φ = 7851232.

The previous prime is 19628071. The next prime is 19628101. The reversal of 19628090 is 9082691.

It can be written as a sum of positive squares in 2 ways, for example, as 18088009 + 1540081 = 4253^2 + 1241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 19628090.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981395 + ... + 981414.

Almost surely, 2^19628090 is an apocalyptic number.

19628090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19628090 is a deficient number, since it is larger than the sum of its proper divisors (15702490).

19628090 is a wasteful number, since it uses less digits than its factorization.

19628090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962816.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 19628090 is about 4430.3600305167. The cubic root of 19628090 is about 269.7486916305.

The spelling of 19628090 in words is "nineteen million, six hundred twenty-eight thousand, ninety".