8425040 has 40 divisors (see below), whose sum is σ = 21097608. Its totient is φ = 3110400.

The previous prime is 8424973. The next prime is 8425057. The reversal of 8425040 is 405248.

It can be written as a sum of positive squares in 4 ways, for example, as 1993744 + 6431296 = 1412^2 + 2536^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 8424997 and 8425015.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3011 + ... + 5090.

Almost surely, 2^8425040 is an apocalyptic number.

8425040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8425040 is an abundant number, since it is smaller than the sum of its proper divisors (12672568).

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

8425040 is a wasteful number, since it uses less digits than its factorization.

8425040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8127 (or 8121 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 8425040 is about 2902.5919451414. The cubic root of 8425040 is about 203.4810595979.

The spelling of 8425040 in words is "eight million, four hundred twenty-five thousand, forty".