190390225 has 24 divisors (see below), whose sum is σ = 250885728. Its totient is φ = 142828800.

The previous prime is 190390223. The next prime is 190390229. The reversal of 190390225 is 522093091.

It is not a de Polignac number, because 190390225 - 2¹ = 190390223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190390223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146830 + ... + 148120.

It is an arithmetic number, because the mean of its divisors is an integer number (10453572).

Almost surely, 2^190390225 is an apocalyptic number.

It is an amenable number.

190390225 is a deficient number, since it is larger than the sum of its proper divisors (60495503).

190390225 is a wasteful number, since it uses less digits than its factorization.

190390225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665 (or 1660 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 190390225 is about 13798.1964401149. The cubic root of 190390225 is about 575.2830112794.

The spelling of 190390225 in words is "one hundred ninety million, three hundred ninety thousand, two hundred twenty-five".