1042640340 has 96 divisors (see below), whose sum is σ = 3374058240. Its totient is φ = 235631616.

The previous prime is 1042640321. The next prime is 1042640351. The reversal of 1042640340 is 430462401.

It is a self number, because there is not a number n which added to its sum of digits gives 1042640340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23434 + ... + 51326.

It is an arithmetic number, because the mean of its divisors is an integer number (35146440).

Almost surely, 2^1042640340 is an apocalyptic number.

1042640340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1042640340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1687029120).

1042640340 is an abundant number, since it is smaller than the sum of its proper divisors (2331417900).

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

1042640340 is a wasteful number, since it uses less digits than its factorization.

1042640340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28001 (or 27999 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1042640340 is about 32289.9417775876. The cubic root of 1042640340 is about 1014.0160783915.

The spelling of 1042640340 in words is "one billion, forty-two million, six hundred forty thousand, three hundred forty".