28470340 has 24 divisors (see below), whose sum is σ = 60060672. Its totient is φ = 11336160.

The previous prime is 28470331. The next prime is 28470349. The reversal of 28470340 is 4307482.

It is an interprime number because it is at equal distance from previous prime (28470331) and next prime (28470349).

It is a junction number, because it is equal to n+sod(n) for n = 28470299 and 28470308.

It is not an unprimeable number, because it can be changed into a prime (28470349) by changing a digit.

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, 1405 + ... + 7675.

It is an arithmetic number, because the mean of its divisors is an integer number (2502528).

Almost surely, 2^28470340 is an apocalyptic number.

28470340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28470340 is an abundant number, since it is smaller than the sum of its proper divisors (31590332).

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

28470340 is a wasteful number, since it uses less digits than its factorization.

28470340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6507 (or 6505 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 28470340 is about 5335.7604893773. The cubic root of 28470340 is about 305.3497376608.

The spelling of 28470340 in words is "twenty-eight million, four hundred seventy thousand, three hundred forty".