190428642 has 24 divisors (see below), whose sum is σ = 414074700. Its totient is φ = 63248640.

The previous prime is 190428619. The next prime is 190428683. The reversal of 190428642 is 246824091.

190428642 = 1274² + 1275² + ... + 1381².

190428642 is a `hidden beast` number, since 1 + 9 + 0 + 4 + 2 + 8 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 164326761 + 26101881 = 12819^2 + 5109^2 .

It is a junction number, because it is equal to n+sod(n) for n = 190428597 and 190428606.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13767 + ... + 23882.

Almost surely, 2^190428642 is an apocalyptic number.

190428642 is an abundant number, since it is smaller than the sum of its proper divisors (223646058).

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

190428642 is a wasteful number, since it uses less digits than its factorization.

190428642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37938 (or 37935 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 190428642 is about 13799.5884721248. The cubic root of 190428642 is about 575.3217022734.

The spelling of 190428642 in words is "one hundred ninety million, four hundred twenty-eight thousand, six hundred forty-two".