1396978200 has 72 divisors (see below), whose sum is σ = 4691524500. Its totient is φ = 372527040.

The previous prime is 1396978159. The next prime is 1396978201. The reversal of 1396978200 is 28796931.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396978201) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 386250 + ... + 389849.

Almost surely, 2^1396978200 is an apocalyptic number.

1396978200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1396978200 is an abundant number, since it is smaller than the sum of its proper divisors (3294546300).

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

1396978200 is a wasteful number, since it uses less digits than its factorization.

1396978200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776121 (or 776109 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1396978200 is about 37376.1715535446. The cubic root of 1396978200 is about 1117.8834922428.

The spelling of 1396978200 in words is "one billion, three hundred ninety-six million, nine hundred seventy-eight thousand, two hundred".