28204956 has 48 divisors (see below), whose sum is σ = 78752800. Its totient is φ = 8678016.

The previous prime is 28204951. The next prime is 28204973. The reversal of 28204956 is 65940282.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28204956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28204951) 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, 8641 + ... + 11448.

Almost surely, 2^28204956 is an apocalyptic number.

28204956 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28204956 is an abundant number, since it is smaller than the sum of its proper divisors (50547844).

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

28204956 is a wasteful number, since it uses less digits than its factorization.

28204956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20115 (or 20107 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 28204956 is about 5310.8338328364. The cubic root of 28204956 is about 304.3980099596.

It can be divided in two parts, 2820 and 4956, that added together give a 5-th power (7776 = 6⁵).

The spelling of 28204956 in words is "twenty-eight million, two hundred four thousand, nine hundred fifty-six".