1399957960 has 32 divisors (see below), whose sum is σ = 3172579200. Its totient is φ = 555952320.

The previous prime is 1399957921. The next prime is 1399957961. The reversal of 1399957960 is 697599931.

It is a junction number, because it is equal to n+sod(n) for n = 1399957895 and 1399957904.

It is not an unprimeable number, because it can be changed into a prime (1399957961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120336 + ... + 131455.

It is an arithmetic number, because the mean of its divisors is an integer number (99143100).

Almost surely, 2^1399957960 is an apocalyptic number.

1399957960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1399957960 is an abundant number, since it is smaller than the sum of its proper divisors (1772621240).

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

1399957960 is a wasteful number, since it uses less digits than its factorization.

1399957960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251941 (or 251937 counting only the distinct ones).

The product of its (nonzero) digits is 4133430, while the sum is 58.

The square root of 1399957960 is about 37416.0120803915. The cubic root of 1399957960 is about 1118.6777444257.

The spelling of 1399957960 in words is "one billion, three hundred ninety-nine million, nine hundred fifty-seven thousand, nine hundred sixty".