19138480 has 20 divisors (see below), whose sum is σ = 44497152. Its totient is φ = 7655360.

The previous prime is 19138433. The next prime is 19138487. The reversal of 19138480 is 8483191.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (19138487) 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, 119536 + ... + 119695.

Almost surely, 2^19138480 is an apocalyptic number.

19138480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19138480 is an abundant number, since it is smaller than the sum of its proper divisors (25358672).

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

19138480 is a wasteful number, since it uses less digits than its factorization.

19138480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239244 (or 239238 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 19138480 is about 4374.7548502745. The cubic root of 19138480 is about 267.4868773951.

The spelling of 19138480 in words is "nineteen million, one hundred thirty-eight thousand, four hundred eighty".