190028861929 has 3 divisors (see below), whose sum is σ = 190029297853. Its totient is φ = 190028426006.

The previous prime is 190028861917. The next prime is 190028861941. The reversal of 190028861929 is 929168820091.

The square root of 190028861929 is 435923.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 929168820091 = 199289 ⋅4662419.

It is an interprime number because it is at equal distance from previous prime (190028861917) and next prime (190028861941).

It is not a de Polignac number, because 190028861929 - 2⁷ = 190028861801 is a prime.

It is a super-2 number, since 2×190028861929² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 190028861929.

It is not an unprimeable number, because it can be changed into a prime (190028861989) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 217962 + ... + 653884.

Almost surely, 2^190028861929 is an apocalyptic number.

190028861929 is the 435923-rd square number.

190028861929 is the 217962-nd centered octagonal number.

It is an amenable number.

190028861929 is a deficient number, since it is larger than the sum of its proper divisors (435924).

190028861929 is an frugal number, since it uses more digits than its factorization.

190028861929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871846 (or 435923 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 55.

The spelling of 190028861929 in words is "one hundred ninety billion, twenty-eight million, eight hundred sixty-one thousand, nine hundred twenty-nine".