1387196928 has 400 divisors, whose sum is σ = 4658201856. Its totient is φ = 408084480.

The previous prime is 1387196917. The next prime is 1387196969. The reversal of 1387196928 is 8296917831.

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 (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16713175 + ... + 16713257.

Almost surely, 2^1387196928 is an apocalyptic number.

1387196928 is a gapful number since it is divisible by the number (18) 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 1387196928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2329100928).

1387196928 is an abundant number, since it is smaller than the sum of its proper divisors (3271004928).

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

1387196928 is an equidigital number, since it uses as much as digits as its factorization.

1387196928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 132 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 1387196928 is about 37245.0926700418. The cubic root of 1387196928 is about 1115.2683376229.

The spelling of 1387196928 in words is "one billion, three hundred eighty-seven million, one hundred ninety-six thousand, nine hundred twenty-eight".