19790225 has 24 divisors (see below), whose sum is σ = 30206400. Its totient is φ = 12525120.

The previous prime is 19790213. The next prime is 19790233. The reversal of 19790225 is 52209791.

It is not a de Polignac number, because 19790225 - 2⁶ = 19790161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2075 + ... + 6624.

It is an arithmetic number, because the mean of its divisors is an integer number (1258600).

Almost surely, 2^19790225 is an apocalyptic number.

It is an amenable number.

19790225 is a deficient number, since it is larger than the sum of its proper divisors (10416175).

19790225 is a wasteful number, since it uses less digits than its factorization.

19790225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8729 (or 8724 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 19790225 is about 4448.6205727169. The cubic root of 19790225 is about 270.4893958895.

The spelling of 19790225 in words is "nineteen million, seven hundred ninety thousand, two hundred twenty-five".