28857460 has 12 divisors (see below), whose sum is σ = 60600708. Its totient is φ = 11542976.

The previous prime is 28857443. The next prime is 28857467. The reversal of 28857460 is 6475882.

It can be written as a sum of positive squares in 2 ways, for example, as 9108324 + 19749136 = 3018^2 + 4444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28857467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721417 + ... + 721456.

It is an arithmetic number, because the mean of its divisors is an integer number (5050059).

Almost surely, 2^28857460 is an apocalyptic number.

28857460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28857460 is an abundant number, since it is smaller than the sum of its proper divisors (31743248).

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

28857460 is a wasteful number, since it uses less digits than its factorization.

28857460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442882 (or 1442880 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 28857460 is about 5371.9139978224. The cubic root of 28857460 is about 306.7274900361.

The spelling of 28857460 in words is "twenty-eight million, eight hundred fifty-seven thousand, four hundred sixty".