28356345 has 32 divisors (see below), whose sum is σ = 52156800. Its totient is φ = 14599872.

The previous prime is 28356337. The next prime is 28356347. The reversal of 28356345 is 54365382.

It is a happy number.

It is not a de Polignac number, because 28356345 - 2³ = 28356337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28356347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294 + ... + 7536.

It is an arithmetic number, because the mean of its divisors is an integer number (1629900).

Almost surely, 2^28356345 is an apocalyptic number.

It is an amenable number.

28356345 is a deficient number, since it is larger than the sum of its proper divisors (23800455).

28356345 is a wasteful number, since it uses less digits than its factorization.

28356345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7286 (or 7280 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 28356345 is about 5325.0676052047. The cubic root of 28356345 is about 304.9416532661.

It can be divided in two parts, 2835 and 6345, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 28356345 in words is "twenty-eight million, three hundred fifty-six thousand, three hundred forty-five".