190439856 has 80 divisors (see below), whose sum is σ = 548536320. Its totient is φ = 63259200.

The previous prime is 190439833. The next prime is 190439863. The reversal of 190439856 is 658934091.

190439856 = 2424² + 2425² + ... + 2455².

It is a happy number.

190439856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164881 + ... + 166031.

It is an arithmetic number, because the mean of its divisors is an integer number (6856704).

Almost surely, 2^190439856 is an apocalyptic number.

190439856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190439856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274268160).

190439856 is an abundant number, since it is smaller than the sum of its proper divisors (358096464).

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

190439856 is a wasteful number, since it uses less digits than its factorization.

190439856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551 (or 1539 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 190439856 is about 13799.9947826077. The cubic root of 190439856 is about 575.3329952716.

The spelling of 190439856 in words is "one hundred ninety million, four hundred thirty-nine thousand, eight hundred fifty-six".