1397069856 has 240 divisors, whose sum is σ = 5057769024. Its totient is φ = 368395776.

The previous prime is 1397069837. The next prime is 1397069881. The reversal of 1397069856 is 6589607931.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 39 ways as a sum of consecutive naturals, for example, 232911 + ... + 238833.

Almost surely, 2^1397069856 is an apocalyptic number.

1397069856 is a gapful number since it is divisible by the number (16) 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 1397069856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2528884512).

1397069856 is an abundant number, since it is smaller than the sum of its proper divisors (3660699168).

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

1397069856 is a wasteful number, since it uses less digits than its factorization.

1397069856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5965 (or 5948 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 1397069856 is about 37377.3976622236. The cubic root of 1397069856 is about 1117.9079398895.

The spelling of 1397069856 in words is "one billion, three hundred ninety-seven million, sixty-nine thousand, eight hundred fifty-six".