4161840 has 40 divisors (see below), whose sum is σ = 12902448. Its totient is φ = 1109760.

The previous prime is 4161823. The next prime is 4161851. The reversal of 4161840 is 481614.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 4161840.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8431 + ... + 8910.

Almost surely, 2^4161840 is an apocalyptic number.

4161840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4161840 is an abundant number, since it is smaller than the sum of its proper divisors (8740608).

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

4161840 is a wasteful number, since it uses less digits than its factorization.

4161840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17357 (or 17351 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 4161840 is about 2040.0588226813. The cubic root of 4161840 is about 160.8527388208.

The spelling of 4161840 in words is "four million, one hundred sixty-one thousand, eight hundred forty".