190939840 has 224 divisors, whose sum is σ = 573511680. Its totient is φ = 58945536.

The previous prime is 190939831. The next prime is 190939843. The reversal of 190939840 is 48939091.

It is a tau number, because it is divible by the number of its divisors (224).

It is not an unprimeable number, because it can be changed into a prime (190939843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2300439 + ... + 2300521.

It is an arithmetic number, because the mean of its divisors is an integer number (2560320).

Almost surely, 2^190939840 is an apocalyptic number.

190939840 is a gapful number since it is divisible by the number (10) 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 190939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286755840).

190939840 is an abundant number, since it is smaller than the sum of its proper divisors (382571840).

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

190939840 is a wasteful number, since it uses less digits than its factorization.

190939840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 190939840 is about 13818.0982772594. The cubic root of 190939840 is about 575.8360515904.

The spelling of 190939840 in words is "one hundred ninety million, nine hundred thirty-nine thousand, eight hundred forty".