19880440 has 16 divisors (see below), whose sum is σ = 44731080. Its totient is φ = 7952160.

The previous prime is 19880437. The next prime is 19880461. The reversal of 19880440 is 4408891.

It is a junction number, because it is equal to n+sod(n) for n = 19880396 and 19880405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248466 + ... + 248545.

Almost surely, 2^19880440 is an apocalyptic number.

19880440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19880440 is an abundant number, since it is smaller than the sum of its proper divisors (24850640).

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

19880440 is a wasteful number, since it uses less digits than its factorization.

19880440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497022 (or 497018 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 19880440 is about 4458.7487033920. The cubic root of 19880440 is about 270.8997872959.

The spelling of 19880440 in words is "nineteen million, eight hundred eighty thousand, four hundred forty".