1300631640 has 128 divisors (see below), whose sum is σ = 4864734720. Its totient is φ = 270259200.

The previous prime is 1300631603. The next prime is 1300631693. The reversal of 1300631640 is 461360031.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1300631640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61141 + ... + 79620.

It is an arithmetic number, because the mean of its divisors is an integer number (38005740).

Almost surely, 2^1300631640 is an apocalyptic number.

1300631640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1300631640 is an abundant number, since it is smaller than the sum of its proper divisors (3564103080).

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

1300631640 is a wasteful number, since it uses less digits than its factorization.

1300631640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140793 (or 140789 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1300631640 is about 36064.2709617150. The cubic root of 1300631640 is about 1091.5696153128.

Adding to 1300631640 its reverse (461360031), we get a palindrome (1761991671).

The spelling of 1300631640 in words is "one billion, three hundred million, six hundred thirty-one thousand, six hundred forty".