19138356 has 30 divisors (see below), whose sum is σ = 50032290. Its totient is φ = 6379344.

The previous prime is 19138313. The next prime is 19138373. The reversal of 19138356 is 65383191.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17892900 + 1245456 = 4230^2 + 1116^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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 19138356.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 29211 + ... + 29858.

It is an arithmetic number, because the mean of its divisors is an integer number (1667743).

Almost surely, 2^19138356 is an apocalyptic number.

It is an amenable number.

19138356 is an abundant number, since it is smaller than the sum of its proper divisors (30893934).

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

19138356 is a wasteful number, since it uses less digits than its factorization.

19138356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59085 (or 59074 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 19138356 is about 4374.7406780288. The cubic root of 19138356 is about 267.4862997030.

The spelling of 19138356 in words is "nineteen million, one hundred thirty-eight thousand, three hundred fifty-six".