1403320340 has 24 divisors (see below), whose sum is σ = 2977357992. Its totient is φ = 555540480.

The previous prime is 1403320337. The next prime is 1403320439. The reversal of 1403320340 is 430233041.

It can be written as a sum of positive squares in 4 ways, for example, as 402483844 + 1000836496 = 20062^2 + 31636^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359741 + ... + 363620.

It is an arithmetic number, because the mean of its divisors is an integer number (124056583).

Almost surely, 2^1403320340 is an apocalyptic number.

1403320340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1403320340 is an abundant number, since it is smaller than the sum of its proper divisors (1574037652).

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

1403320340 is a wasteful number, since it uses less digits than its factorization.

1403320340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723467 (or 723465 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 1403320340 is about 37460.9175007767. The cubic root of 1403320340 is about 1119.5726313761.

Adding to 1403320340 its reverse (430233041), we get a palindrome (1833553381).

The spelling of 1403320340 in words is "one billion, four hundred three million, three hundred twenty thousand, three hundred forty".