1403240020 has 48 divisors (see below), whose sum is σ = 3626840448. Its totient is φ = 444101760.

The previous prime is 1403240009. The next prime is 1403240021. The reversal of 1403240020 is 200423041.

It is a junction number, because it is equal to n+sod(n) for n = 1403239976 and 1403240003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1403240021) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 383686 + ... + 387325.

It is an arithmetic number, because the mean of its divisors is an integer number (75559176).

Almost surely, 2^1403240020 is an apocalyptic number.

1403240020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1403240020 is an abundant number, since it is smaller than the sum of its proper divisors (2223600428).

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

1403240020 is a wasteful number, since it uses less digits than its factorization.

1403240020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771040 (or 771038 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1403240020 is about 37459.8454348119. The cubic root of 1403240020 is about 1119.5512711333.

Adding to 1403240020 its reverse (200423041), we get a palindrome (1603663061).

The spelling of 1403240020 in words is "one billion, four hundred three million, two hundred forty thousand, twenty".