19139284 has 6 divisors (see below), whose sum is σ = 33493754. Its totient is φ = 9569640.

The previous prime is 19139273. The next prime is 19139291. The reversal of 19139284 is 48293191.

It can be written as a sum of positive squares in only one way, i.e., 11410884 + 7728400 = 3378^2 + 2780^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2392407 + ... + 2392414.

Almost surely, 2^19139284 is an apocalyptic number.

It is an amenable number.

19139284 is a deficient number, since it is larger than the sum of its proper divisors (14354470).

19139284 is a wasteful number, since it uses less digits than its factorization.

19139284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784825 (or 4784823 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 19139284 is about 4374.8467401727. The cubic root of 19139284 is about 267.4906230154.

The spelling of 19139284 in words is "nineteen million, one hundred thirty-nine thousand, two hundred eighty-four".