28870408 has 48 divisors (see below), whose sum is σ = 64350720. Its totient is φ = 12102048.

The previous prime is 28870379. The next prime is 28870409. The reversal of 28870408 is 80407882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28870409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17641 + ... + 19207.

It is an arithmetic number, because the mean of its divisors is an integer number (1340640).

Almost surely, 2^28870408 is an apocalyptic number.

28870408 is a gapful number since it is divisible by the number (28) 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 28870408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32175360).

28870408 is an abundant number, since it is smaller than the sum of its proper divisors (35480312).

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

28870408 is a wasteful number, since it uses less digits than its factorization.

28870408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 28870408 is about 5373.1190197129. The cubic root of 28870408 is about 306.7733581721.

The spelling of 28870408 in words is "twenty-eight million, eight hundred seventy thousand, four hundred eight".