1040144399 has 4 divisors (see below), whose sum is σ = 1188736464. Its totient is φ = 891552336.

The previous prime is 1040144393. The next prime is 1040144401. The reversal of 1040144399 is 9934410401.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1040144399 - 2⁴ = 1040144383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040144393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74296022 + ... + 74296035.

It is an arithmetic number, because the mean of its divisors is an integer number (297184116).

Almost surely, 2^1040144399 is an apocalyptic number.

1040144399 is a deficient number, since it is larger than the sum of its proper divisors (148592065).

1040144399 is an equidigital number, since it uses as much as digits as its factorization.

1040144399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148592064.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1040144399 is about 32251.2697269425. The cubic root of 1040144399 is about 1013.2062924209.

The spelling of 1040144399 in words is "one billion, forty million, one hundred forty-four thousand, three hundred ninety-nine".