190709740 has 72 divisors (see below), whose sum is σ = 459315360. Its totient is φ = 66253824.

The previous prime is 190709699. The next prime is 190709749. The reversal of 190709740 is 47907091.

It is a self number, because there is not a number n which added to its sum of digits gives 190709740.

It is not an unprimeable number, because it can be changed into a prime (190709749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55801 + ... + 59119.

It is an arithmetic number, because the mean of its divisors is an integer number (6379380).

Almost surely, 2^190709740 is an apocalyptic number.

190709740 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 190709740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229657680).

190709740 is an abundant number, since it is smaller than the sum of its proper divisors (268605620).

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

190709740 is a wasteful number, since it uses less digits than its factorization.

190709740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3371 (or 3356 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 190709740 is about 13809.7697301584. The cubic root of 190709740 is about 575.6046468785.

The spelling of 190709740 in words is "one hundred ninety million, seven hundred nine thousand, seven hundred forty".