190897729428 has 48 divisors (see below), whose sum is σ = 511873142144. Its totient is φ = 54240865920.

The previous prime is 190897729427. The next prime is 190897729439. The reversal of 190897729428 is 824927798091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190897729427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6262675 + ... + 6293082.

Almost surely, 2^190897729428 is an apocalyptic number.

It is an amenable number.

190897729428 is an abundant number, since it is smaller than the sum of its proper divisors (320975412716).

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

190897729428 is a wasteful number, since it uses less digits than its factorization.

190897729428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12555952 (or 12555950 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 66.

The spelling of 190897729428 in words is "one hundred ninety billion, eight hundred ninety-seven million, seven hundred twenty-nine thousand, four hundred twenty-eight".