190999748 has 12 divisors (see below), whose sum is σ = 335982780. Its totient is φ = 95004672.

The previous prime is 190999747. The next prime is 190999759. The reversal of 190999748 is 847999091.

It can be written as a sum of positive squares in 2 ways, for example, as 135675904 + 55323844 = 11648^2 + 7438^2 .

It is a junction number, because it is equal to n+sod(n) for n = 190999693 and 190999702.

It is not an unprimeable number, because it can be changed into a prime (190999741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122933 + ... + 124476.

It is an arithmetic number, because the mean of its divisors is an integer number (27998565).

Almost surely, 2^190999748 is an apocalyptic number.

It is an amenable number.

190999748 is a deficient number, since it is larger than the sum of its proper divisors (144983032).

190999748 is a wasteful number, since it uses less digits than its factorization.

190999748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247606 (or 247604 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 56.

The square root of 190999748 is about 13820.2658440422. The cubic root of 190999748 is about 575.8962687753.

The spelling of 190999748 in words is "one hundred ninety million, nine hundred ninety-nine thousand, seven hundred forty-eight".