1040425040 has 40 divisors (see below), whose sum is σ = 2420925408. Its totient is φ = 415836800.

The previous prime is 1040425039. The next prime is 1040425049. The reversal of 1040425040 is 405240401.

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 (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040425049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111599 + ... + 120561.

Almost surely, 2^1040425040 is an apocalyptic number.

1040425040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1040425040 is an abundant number, since it is smaller than the sum of its proper divisors (1380500368).

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

1040425040 is a wasteful number, since it uses less digits than its factorization.

1040425040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10427 (or 10421 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1040425040 is about 32255.6202854634. The cubic root of 1040425040 is about 1013.2974085063.

Adding to 1040425040 its reverse (405240401), we get a palindrome (1445665441).

The spelling of 1040425040 in words is "one billion, forty million, four hundred twenty-five thousand, forty".