1396847640 has 64 divisors (see below), whose sum is σ = 4335055200. Its totient is φ = 359647232.

The previous prime is 1396847633. The next prime is 1396847671. The reversal of 1396847640 is 467486931.

It is a self number, because there is not a number n which added to its sum of digits gives 1396847640.

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, 197217 + ... + 204176.

Almost surely, 2^1396847640 is an apocalyptic number.

1396847640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1396847640 is an abundant number, since it is smaller than the sum of its proper divisors (2938207560).

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

1396847640 is a wasteful number, since it uses less digits than its factorization.

1396847640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401436 (or 401432 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 1396847640 is about 37374.4249454089. The cubic root of 1396847640 is about 1117.8486657829.

The spelling of 1396847640 in words is "one billion, three hundred ninety-six million, eight hundred forty-seven thousand, six hundred forty".