4197840 has 40 divisors (see below), whose sum is σ = 13014048. Its totient is φ = 1119360.

The previous prime is 4197839. The next prime is 4197857. The reversal of 4197840 is 487914.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8506 + ... + 8985.

Almost surely, 2^4197840 is an apocalyptic number.

4197840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4197840 is an abundant number, since it is smaller than the sum of its proper divisors (8816208).

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

4197840 is a wasteful number, since it uses less digits than its factorization.

4197840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17507 (or 17501 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 4197840 is about 2048.8630993798. The cubic root of 4197840 is about 161.3152010828.

The spelling of 4197840 in words is "four million, one hundred ninety-seven thousand, eight hundred forty".