19140428 has 12 divisors (see below), whose sum is σ = 33841752. Its totient is φ = 9471360.

The previous prime is 19140427. The next prime is 19140431. The reversal of 19140428 is 82404191.

It is a self number, because there is not a number n which added to its sum of digits gives 19140428.

It is not an unprimeable number, because it can be changed into a prime (19140427) 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, 24278 + ... + 25053.

It is an arithmetic number, because the mean of its divisors is an integer number (2820146).

Almost surely, 2^19140428 is an apocalyptic number.

It is an amenable number.

19140428 is a deficient number, since it is larger than the sum of its proper divisors (14701324).

19140428 is a wasteful number, since it uses less digits than its factorization.

19140428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49432 (or 49430 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 19140428 is about 4374.9774856564. The cubic root of 19140428 is about 267.4959524237.

The spelling of 19140428 in words is "nineteen million, one hundred forty thousand, four hundred twenty-eight".