28471632 has 40 divisors (see below), whose sum is σ = 84060096. Its totient is φ = 8134656.

The previous prime is 28471621. The next prime is 28471643. The reversal of 28471632 is 23617482.

It is an interprime number because it is at equal distance from previous prime (28471621) and next prime (28471643).

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

It is a junction number, because it is equal to n+sod(n) for n = 28471593 and 28471602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42033 + ... + 42704.

Almost surely, 2^28471632 is an apocalyptic number.

It is an amenable number.

28471632 is an abundant number, since it is smaller than the sum of its proper divisors (55588464).

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

28471632 is a wasteful number, since it uses less digits than its factorization.

28471632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84755 (or 84749 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 28471632 is about 5335.8815579059. The cubic root of 28471632 is about 305.3543565717.

The spelling of 28471632 in words is "twenty-eight million, four hundred seventy-one thousand, six hundred thirty-two".