4098640 has 80 divisors (see below), whose sum is σ = 11749248. Its totient is φ = 1294848.

The previous prime is 4098637. The next prime is 4098641. The reversal of 4098640 is 468904.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4098641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6999 + ... + 7561.

Almost surely, 2^4098640 is an apocalyptic number.

4098640 is a gapful number since it is divisible by the number (40) 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 4098640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5874624).

4098640 is an abundant number, since it is smaller than the sum of its proper divisors (7650608).

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

4098640 is a wasteful number, since it uses less digits than its factorization.

4098640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 590 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 4098640 is about 2024.5098172150. The cubic root of 4098640 is about 160.0343676174.

The spelling of 4098640 in words is "four million, ninety-eight thousand, six hundred forty".