190870405 has 16 divisors (see below), whose sum is σ = 250253568. Its totient is φ = 138600000.

The previous prime is 190870391. The next prime is 190870469. The reversal of 190870405 is 504078091.

It is a happy number.

It is not a de Polignac number, because 190870405 - 2¹⁵ = 190837637 is a prime.

It is a Duffinian number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 38995 + ... + 43615.

It is an arithmetic number, because the mean of its divisors is an integer number (15640848).

Almost surely, 2^190870405 is an apocalyptic number.

It is an amenable number.

190870405 is a deficient number, since it is larger than the sum of its proper divisors (59383163).

190870405 is a wasteful number, since it uses less digits than its factorization.

190870405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5388.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 190870405 is about 13815.5855829567. The cubic root of 190870405 is about 575.7662424752.

The spelling of 190870405 in words is "one hundred ninety million, eight hundred seventy thousand, four hundred five".