19896240 has 160 divisors (see below), whose sum is σ = 75995136. Its totient is φ = 4193280.

The previous prime is 19896221. The next prime is 19896241. The reversal of 19896240 is 4269891.

It is a super-2 number, since 2×19896240² = 791720732275200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (19896241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21385 + ... + 22295.

Almost surely, 2^19896240 is an apocalyptic number.

19896240 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 19896240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37997568).

19896240 is an abundant number, since it is smaller than the sum of its proper divisors (56098896).

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

19896240 is a wasteful number, since it uses less digits than its factorization.

19896240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 941 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 19896240 is about 4460.5201490409. The cubic root of 19896240 is about 270.9715342531.

The spelling of 19896240 in words is "nineteen million, eight hundred ninety-six thousand, two hundred forty".