28621632 has 56 divisors (see below), whose sum is σ = 81560416. Its totient is φ = 8805888.

The previous prime is 28621631. The next prime is 28621633. The reversal of 28621632 is 23612682.

It is an interprime number because it is at equal distance from previous prime (28621631) and next prime (28621633).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 28621632.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28621631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3238 + ... + 8229.

It is an arithmetic number, because the mean of its divisors is an integer number (1456436).

Almost surely, 2^28621632 is an apocalyptic number.

It is an amenable number.

28621632 is an abundant number, since it is smaller than the sum of its proper divisors (52938784).

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

28621632 is a wasteful number, since it uses less digits than its factorization.

28621632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11495 (or 11485 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 28621632 is about 5349.9188778896. The cubic root of 28621632 is about 305.8896607606.

The spelling of 28621632 in words is "twenty-eight million, six hundred twenty-one thousand, six hundred thirty-two".