1307403840 has 56 divisors (see below), whose sum is σ = 4151010240. Its totient is φ = 348640768.

The previous prime is 1307403829. The next prime is 1307403857. The reversal of 1307403840 is 483047031.

It is a super-4 number, since 4×1307403840⁴ (a number of 38 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1307403798 and 1307403807.

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, 679980 + ... + 681899.

Almost surely, 2^1307403840 is an apocalyptic number.

1307403840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1307403840 is an abundant number, since it is smaller than the sum of its proper divisors (2843606400).

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

1307403840 is a wasteful number, since it uses less digits than its factorization.

1307403840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361899 (or 1361889 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 1307403840 is about 36158.0397698769. The cubic root of 1307403840 is about 1093.4608847157.

The spelling of 1307403840 in words is "one billion, three hundred seven million, four hundred three thousand, eight hundred forty".