8401940 has 12 divisors (see below), whose sum is σ = 17644116. Its totient is φ = 3360768.

The previous prime is 8401919. The next prime is 8401949. The reversal of 8401940 is 491048.

It can be written as a sum of positive squares in 2 ways, for example, as 5626384 + 2775556 = 2372^2 + 1666^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8401949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210029 + ... + 210068.

It is an arithmetic number, because the mean of its divisors is an integer number (1470343).

Almost surely, 2^8401940 is an apocalyptic number.

It is an amenable number.

8401940 is an abundant number, since it is smaller than the sum of its proper divisors (9242176).

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

8401940 is a wasteful number, since it uses less digits than its factorization.

8401940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420106 (or 420104 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 8401940 is about 2898.6100117125. The cubic root of 8401940 is about 203.2949194356.

Adding to 8401940 its reverse (491048), we get a palindrome (8892988).

The spelling of 8401940 in words is "eight million, four hundred one thousand, nine hundred forty".