1396993632 has 144 divisors (see below), whose sum is σ = 3989506752. Its totient is φ = 427714560.

The previous prime is 1396993613. The next prime is 1396993679. The reversal of 1396993632 is 2363996931.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1192407 + ... + 1193577.

It is an arithmetic number, because the mean of its divisors is an integer number (27704908).

Almost surely, 2^1396993632 is an apocalyptic number.

1396993632 is a gapful number since it is divisible by the number (12) 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 1396993632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1994753376).

1396993632 is an abundant number, since it is smaller than the sum of its proper divisors (2592513120).

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

1396993632 is a wasteful number, since it uses less digits than its factorization.

1396993632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261 (or 1236 counting only the distinct ones).

The product of its digits is 1417176, while the sum is 51.

The square root of 1396993632 is about 37376.3779946640. The cubic root of 1396993632 is about 1117.8876085357.

The spelling of 1396993632 in words is "one billion, three hundred ninety-six million, nine hundred ninety-three thousand, six hundred thirty-two".