28471320 has 48 divisors (see below), whose sum is σ = 92532960. Its totient is φ = 7592256.

The previous prime is 28471319. The next prime is 28471321. The reversal of 28471320 is 2317482.

It is an interprime number because it is at equal distance from previous prime (28471319) and next prime (28471321).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28471321) 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, 39184 + ... + 39903.

It is an arithmetic number, because the mean of its divisors is an integer number (1927770).

Almost surely, 2^28471320 is an apocalyptic number.

28471320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28471320 is an abundant number, since it is smaller than the sum of its proper divisors (64061640).

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

28471320 is a wasteful number, since it uses less digits than its factorization.

28471320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79104 (or 79097 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28471320 is about 5335.8523217945. The cubic root of 28471320 is about 305.3532411819.

The spelling of 28471320 in words is "twenty-eight million, four hundred seventy-one thousand, three hundred twenty".