801478728 has 24 divisors (see below), whose sum is σ = 2170671750. Its totient is φ = 267159552.

The previous prime is 801478721. The next prime is 801478747. The reversal of 801478728 is 827874108.

It can be written as a sum of positive squares in only one way, i.e., 733218084 + 68260644 = 27078^2 + 8262^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (801478721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5565753 + ... + 5565896.

Almost surely, 2^801478728 is an apocalyptic number.

It is an amenable number.

801478728 is an abundant number, since it is smaller than the sum of its proper divisors (1369193022).

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

801478728 is a wasteful number, since it uses less digits than its factorization.

801478728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11131661 (or 11131654 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The square root of 801478728 is about 28310.3996439471. The cubic root of 801478728 is about 928.8893852863.

The spelling of 801478728 in words is "eight hundred one million, four hundred seventy-eight thousand, seven hundred twenty-eight".