8401240 has 16 divisors (see below), whose sum is σ = 18902880. Its totient is φ = 3360480.

The previous prime is 8401219. The next prime is 8401241. The reversal of 8401240 is 421048.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8401241) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 104976 + ... + 105055.

It is an arithmetic number, because the mean of its divisors is an integer number (1181430).

Almost surely, 2^8401240 is an apocalyptic number.

It is an amenable number.

8401240 is an abundant number, since it is smaller than the sum of its proper divisors (10501640).

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

8401240 is a wasteful number, since it uses less digits than its factorization.

8401240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210042 (or 210038 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 8401240 is about 2898.4892616672. The cubic root of 8401240 is about 203.2892735016.

Adding to 8401240 its reverse (421048), we get a palindrome (8822288).

It can be divided in two parts, 840 and 1240, that added together give a triangular number (2080 = T₆₄).

The spelling of 8401240 in words is "eight million, four hundred one thousand, two hundred forty".