1396617440 has 96 divisors (see below), whose sum is σ = 3399369120. Its totient is φ = 541900800.

The previous prime is 1396617437. The next prime is 1396617451. The reversal of 1396617440 is 447166931.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1383656 + ... + 1384664.

It is an arithmetic number, because the mean of its divisors is an integer number (35410095).

Almost surely, 2^1396617440 is an apocalyptic number.

1396617440 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 1396617440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1699684560).

1396617440 is an abundant number, since it is smaller than the sum of its proper divisors (2002751680).

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

1396617440 is a wasteful number, since it uses less digits than its factorization.

1396617440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1268 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 1396617440 is about 37371.3451724714. The cubic root of 1396617440 is about 1117.7872553869.

The spelling of 1396617440 in words is "one billion, three hundred ninety-six million, six hundred seventeen thousand, four hundred forty".