1040040390 has 64 divisors (see below), whose sum is σ = 2582046720. Its totient is φ = 267832320.

The previous prime is 1040040389. The next prime is 1040040401. The reversal of 1040040390 is 930400401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 612022 + ... + 613718.

It is an arithmetic number, because the mean of its divisors is an integer number (40344480).

Almost surely, 2^1040040390 is an apocalyptic number.

1040040390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1040040390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1291023360).

1040040390 is an abundant number, since it is smaller than the sum of its proper divisors (1542006330).

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

1040040390 is a wasteful number, since it uses less digits than its factorization.

1040040390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1040040390 is about 32249.6572074805. The cubic root of 1040040390 is about 1013.1725195184.

Adding to 1040040390 its reverse (930400401), we get a palindrome (1970440791).

The spelling of 1040040390 in words is "one billion, forty million, forty thousand, three hundred ninety".