19140628 has 12 divisors (see below), whose sum is σ = 36072820. Its totient is φ = 8834112.

The previous prime is 19140617. The next prime is 19140629. The reversal of 19140628 is 82604191.

It is a happy number.

19140628 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 2 ways, for example, as 2347024 + 16793604 = 1532^2 + 4098^2 .

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 19140628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19140629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183993 + ... + 184096.

Almost surely, 2^19140628 is an apocalyptic number.

It is an amenable number.

19140628 is a deficient number, since it is larger than the sum of its proper divisors (16932192).

19140628 is a wasteful number, since it uses less digits than its factorization.

19140628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368106 (or 368104 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 19140628 is about 4375.0003428571. Note that the first 3 decimals coincide. The cubic root of 19140628 is about 267.4968841166.

The spelling of 19140628 in words is "nineteen million, one hundred forty thousand, six hundred twenty-eight".