190309404 has 12 divisors (see below), whose sum is σ = 444055304. Its totient is φ = 63436464.

The previous prime is 190309393. The next prime is 190309409. The reversal of 190309404 is 404903091.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190309409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7929547 + ... + 7929570.

Almost surely, 2^190309404 is an apocalyptic number.

It is an amenable number.

190309404 is an abundant number, since it is smaller than the sum of its proper divisors (253745900).

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

190309404 is a wasteful number, since it uses less digits than its factorization.

190309404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15859124 (or 15859122 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 190309404 is about 13795.2674493828. The cubic root of 190309404 is about 575.2015968601.

The spelling of 190309404 in words is "one hundred ninety million, three hundred nine thousand, four hundred four".