1396129680 has 240 divisors, whose sum is σ = 5139313920. Its totient is φ = 336844800.

The previous prime is 1396129643. The next prime is 1396129699. The reversal of 1396129680 is 869216931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 3239065 + ... + 3239495.

It is an arithmetic number, because the mean of its divisors is an integer number (21413808).

Almost surely, 2^1396129680 is an apocalyptic number.

1396129680 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 1396129680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2569656960).

1396129680 is an abundant number, since it is smaller than the sum of its proper divisors (3743184240).

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

1396129680 is a wasteful number, since it uses less digits than its factorization.

1396129680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 861 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 1396129680 is about 37364.8187470513. The cubic root of 1396129680 is about 1117.6571134743.

The spelling of 1396129680 in words is "one billion, three hundred ninety-six million, one hundred twenty-nine thousand, six hundred eighty".