19896140 has 24 divisors (see below), whose sum is σ = 45580752. Its totient is φ = 7234880.

The previous prime is 19896133. The next prime is 19896161. The reversal of 19896140 is 4169891.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19896094 and 19896103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44999 + ... + 45438.

It is an arithmetic number, because the mean of its divisors is an integer number (1899198).

Almost surely, 2^19896140 is an apocalyptic number.

19896140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19896140 is an abundant number, since it is smaller than the sum of its proper divisors (25684612).

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

19896140 is a wasteful number, since it uses less digits than its factorization.

19896140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90457 (or 90455 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 19896140 is about 4460.5089395718. The cubic root of 19896140 is about 270.9710802779.

The spelling of 19896140 in words is "nineteen million, eight hundred ninety-six thousand, one hundred forty".