28735340 has 12 divisors (see below), whose sum is σ = 60344256. Its totient is φ = 11494128.

The previous prime is 28735337. The next prime is 28735361. The reversal of 28735340 is 4353782.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28735297 and 28735306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 718364 + ... + 718403.

It is an arithmetic number, because the mean of its divisors is an integer number (5028688).

Almost surely, 2^28735340 is an apocalyptic number.

28735340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28735340 is an abundant number, since it is smaller than the sum of its proper divisors (31608916).

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

28735340 is a wasteful number, since it uses less digits than its factorization.

28735340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436776 (or 1436774 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 28735340 is about 5360.5354210191. The cubic root of 28735340 is about 306.2942049199.

The spelling of 28735340 in words is "twenty-eight million, seven hundred thirty-five thousand, three hundred forty".