1478386728 has 384 divisors, whose sum is σ = 5232165120. Its totient is φ = 380712960.

The previous prime is 1478386727. The next prime is 1478386757. The reversal of 1478386728 is 8276838741.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1478386727) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10791076 + ... + 10791212.

It is an arithmetic number, because the mean of its divisors is an integer number (13625430).

Almost surely, 2^1478386728 is an apocalyptic number.

1478386728 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 1478386728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2616082560).

1478386728 is an abundant number, since it is smaller than the sum of its proper divisors (3753778392).

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

1478386728 is a wasteful number, since it uses less digits than its factorization.

1478386728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 223 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The square root of 1478386728 is about 38449.7949019237. The cubic root of 1478386728 is about 1139.1896179730.

The spelling of 1478386728 in words is "one billion, four hundred seventy-eight million, three hundred eighty-six thousand, seven hundred twenty-eight".