1301399040 has 160 divisors (see below), whose sum is σ = 4262914656. Its totient is φ = 338493440.

The previous prime is 1301399023. The next prime is 1301399051. The reversal of 1301399040 is 409931031.

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-2 number, since 2×1301399040² = 3387278922625843200, which contains 22 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 = 1301398989 and 1301399007.

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 15 ways as a sum of consecutive naturals, for example, 312814 + ... + 316946.

Almost surely, 2^1301399040 is an apocalyptic number.

1301399040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1301399040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2131457328).

1301399040 is an abundant number, since it is smaller than the sum of its proper divisors (2961515616).

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

1301399040 is an equidigital number, since it uses as much as digits as its factorization.

1301399040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200 (or 4184 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 1301399040 is about 36074.9087316933. The cubic root of 1301399040 is about 1091.7842561081.

The spelling of 1301399040 in words is "one billion, three hundred one million, three hundred ninety-nine thousand, forty".