1396993620 has 192 divisors, whose sum is σ = 4540354560. Its totient is φ = 317376000.

The previous prime is 1396993613. The next prime is 1396993679. The reversal of 1396993620 is 263996931.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1396993620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1265989 + ... + 1267091.

It is an arithmetic number, because the mean of its divisors is an integer number (23647680).

Almost surely, 2^1396993620 is an apocalyptic number.

1396993620 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 1396993620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2270177280).

1396993620 is an abundant number, since it is smaller than the sum of its proper divisors (3143360940).

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

1396993620 is a wasteful number, since it uses less digits than its factorization.

1396993620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 48.

The square root of 1396993620 is about 37376.3778341348. The cubic root of 1396993620 is about 1117.8876053349.

The spelling of 1396993620 in words is "one billion, three hundred ninety-six million, nine hundred ninety-three thousand, six hundred twenty".