190438 has 4 divisors (see below), whose sum is σ = 285660. Its totient is φ = 95218.

The previous prime is 190409. The next prime is 190471. The reversal of 190438 is 834091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834091 = 37 ⋅22543.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

190438 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47608 + ... + 47611.

It is an arithmetic number, because the mean of its divisors is an integer number (71415).

2¹⁹⁰⁴³⁸ is an apocalyptic number.

190438 is a deficient number, since it is larger than the sum of its proper divisors (95222).

190438 is an equidigital number, since it uses as much as digits as its factorization.

190438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95221.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 190438 is about 436.3920255917. The cubic root of 190438 is about 57.5331126227.

The spelling of 190438 in words is "one hundred ninety thousand, four hundred thirty-eight".