19689480 has 160 divisors (see below), whose sum is σ = 67953600. Its totient is φ = 5111424.

The previous prime is 19689479. The next prime is 19689493. The reversal of 19689480 is 8498691.

19689480 is a `hidden beast` number, since 1 + 96 + 89 + 480 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 191109 + ... + 191211.

It is an arithmetic number, because the mean of its divisors is an integer number (424710).

Almost surely, 2^19689480 is an apocalyptic number.

19689480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19689480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33976800).

19689480 is an abundant number, since it is smaller than the sum of its proper divisors (48264120).

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

19689480 is a wasteful number, since it uses less digits than its factorization.

19689480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 19689480 is about 4437.2829524383. The cubic root of 19689480 is about 270.0296263787.

It can be divided in two parts, 196 and 89480, that added together give a triangular number (89676 = T₄₂₃).

The spelling of 19689480 in words is "nineteen million, six hundred eighty-nine thousand, four hundred eighty".