1312633740 has 48 divisors (see below), whose sum is σ = 4009501440. Its totient is φ = 318214080.

The previous prime is 1312633739. The next prime is 1312633741. The reversal of 1312633740 is 473362131.

It is an interprime number because it is at equal distance from previous prime (1312633739) and next prime (1312633741).

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 = 1312633698 and 1312633707.

It is not an unprimeable number, because it can be changed into a prime (1312633741) 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, 993760 + ... + 995079.

It is an arithmetic number, because the mean of its divisors is an integer number (83531280).

Almost surely, 2^1312633740 is an apocalyptic number.

1312633740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312633740 is an abundant number, since it is smaller than the sum of its proper divisors (2696867700).

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

1312633740 is a wasteful number, since it uses less digits than its factorization.

1312633740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988862 (or 1988860 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 1312633740 is about 36230.2876058140. The cubic root of 1312633740 is about 1094.9169720829.

Adding to 1312633740 its reverse (473362131), we get a palindrome (1785995871).

The spelling of 1312633740 in words is "one billion, three hundred twelve million, six hundred thirty-three thousand, seven hundred forty".