8404540 has 24 divisors (see below), whose sum is σ = 18027072. Its totient is φ = 3289920.

The previous prime is 8404531. The next prime is 8404553. The reversal of 8404540 is 454048.

8404540 = T₃₇₅ + T₃₇₆ + ... + T₄₆₈.

It is a super-2 number, since 2×8404540² = 141272585223200, which contains 22 as substring.

It is a congruent number.

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, 3531 + ... + 5410.

It is an arithmetic number, because the mean of its divisors is an integer number (751128).

Almost surely, 2^8404540 is an apocalyptic number.

It is an amenable number.

8404540 is an abundant number, since it is smaller than the sum of its proper divisors (9622532).

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

8404540 is a wasteful number, since it uses less digits than its factorization.

8404540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8997 (or 8995 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 8404540 is about 2899.0584678478. The cubic root of 8404540 is about 203.3158873025.

Adding to 8404540 its reverse (454048), we get a palindrome (8858588).

The spelling of 8404540 in words is "eight million, four hundred four thousand, five hundred forty".