28408952 has 64 divisors (see below), whose sum is σ = 65923200. Its totient is φ = 11283840.

The previous prime is 28408943. The next prime is 28408957. The reversal of 28408952 is 25980482.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28408957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21083 + ... + 22389.

It is an arithmetic number, because the mean of its divisors is an integer number (1030050).

Almost surely, 2^28408952 is an apocalyptic number.

28408952 is a gapful number since it is divisible by the number (22) 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 28408952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32961600).

28408952 is an abundant number, since it is smaller than the sum of its proper divisors (37514248).

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

28408952 is a wasteful number, since it uses less digits than its factorization.

28408952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356 (or 1352 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 28408952 is about 5330.0048780465. The cubic root of 28408952 is about 305.1301137945.

The spelling of 28408952 in words is "twenty-eight million, four hundred eight thousand, nine hundred fifty-two".