28704546 has 48 divisors (see below), whose sum is σ = 67387320. Its totient is φ = 8778240.

The previous prime is 28704541. The next prime is 28704553. The reversal of 28704546 is 64540782.

It can be written as a sum of positive squares in 4 ways, for example, as 26409321 + 2295225 = 5139^2 + 1515^2 .

It is a super-2 number, since 2×28704546² = 1647901922132232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28704546.

It is not an unprimeable number, because it can be changed into a prime (28704541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56140 + ... + 56648.

Almost surely, 2^28704546 is an apocalyptic number.

28704546 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28704546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33693660).

28704546 is an abundant number, since it is smaller than the sum of its proper divisors (38682774).

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

28704546 is a wasteful number, since it uses less digits than its factorization.

28704546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 28704546 is about 5357.6623633820. The cubic root of 28704546 is about 306.1847532249.

The spelling of 28704546 in words is "twenty-eight million, seven hundred four thousand, five hundred forty-six".