219890840 has 32 divisors (see below), whose sum is σ = 532813680. Its totient is φ = 81190272.

The previous prime is 219890813. The next prime is 219890849. The reversal of 219890840 is 48098912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219890849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210914 + ... + 211953.

Almost surely, 2^219890840 is an apocalyptic number.

219890840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

219890840 is an abundant number, since it is smaller than the sum of its proper divisors (312922840).

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

219890840 is a wasteful number, since it uses less digits than its factorization.

219890840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422891 (or 422887 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 219890840 is about 14828.7167347684. The cubic root of 219890840 is about 603.5812119705.

The spelling of 219890840 in words is "two hundred nineteen million, eight hundred ninety thousand, eight hundred forty".