1040398671 has 16 divisors (see below), whose sum is σ = 1534283744. Its totient is φ = 622940544.

The previous prime is 1040398663. The next prime is 1040398699. The reversal of 1040398671 is 1768930401.

It is not a de Polignac number, because 1040398671 - 2³ = 1040398663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040398621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359056 + ... + 361941.

It is an arithmetic number, because the mean of its divisors is an integer number (95892734).

Almost surely, 2^1040398671 is an apocalyptic number.

1040398671 is a deficient number, since it is larger than the sum of its proper divisors (493885073).

1040398671 is a wasteful number, since it uses less digits than its factorization.

1040398671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721050.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 1040398671 is about 32255.2115324020. The cubic root of 1040398671 is about 1013.2888479456.

The spelling of 1040398671 in words is "one billion, forty million, three hundred ninety-eight thousand, six hundred seventy-one".