4219640 has 16 divisors (see below), whose sum is σ = 9494280. Its totient is φ = 1687840.

The previous prime is 4219609. The next prime is 4219651. The reversal of 4219640 is 469124.

4219640 = 189² + 190² + ... + 268².

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, 52706 + ... + 52785.

Almost surely, 2^4219640 is an apocalyptic number.

4219640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4219640 is an abundant number, since it is smaller than the sum of its proper divisors (5274640).

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

4219640 is a wasteful number, since it uses less digits than its factorization.

4219640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105502 (or 105498 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 4219640 is about 2054.1762339196. The cubic root of 4219640 is about 161.5939636016.

The spelling of 4219640 in words is "four million, two hundred nineteen thousand, six hundred forty".