1396631028 has 48 divisors (see below), whose sum is σ = 3513122816. Its totient is φ = 429287040.

The previous prime is 1396631021. The next prime is 1396631029. The reversal of 1396631028 is 8201366931.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396631021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166413 + ... + 174603.

Almost surely, 2^1396631028 is an apocalyptic number.

It is an amenable number.

1396631028 is an abundant number, since it is smaller than the sum of its proper divisors (2116491788).

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

1396631028 is a wasteful number, since it uses less digits than its factorization.

1396631028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9304 (or 9302 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 1396631028 is about 37371.5269690710. The cubic root of 1396631028 is about 1117.7908804416.

Adding to 1396631028 its reverse (8201366931), we get a palindrome (9597997959).

The spelling of 1396631028 in words is "one billion, three hundred ninety-six million, six hundred thirty-one thousand, twenty-eight".