28434425 has 12 divisors (see below), whose sum is σ = 35392080. Its totient is φ = 22661520.

The previous prime is 28434407. The next prime is 28434433. The reversal of 28434425 is 52443482.

It is not a de Polignac number, because 28434425 - 2⁸ = 28434169 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28434391 and 28434400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5066 + ... + 9084.

It is an arithmetic number, because the mean of its divisors is an integer number (2949340).

Almost surely, 2^28434425 is an apocalyptic number.

28434425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28434425 is a deficient number, since it is larger than the sum of its proper divisors (6957655).

28434425 is a wasteful number, since it uses less digits than its factorization.

28434425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4312 (or 4307 counting only the distinct ones).

The product of its digits is 30720, while the sum is 32.

The square root of 28434425 is about 5332.3939276839. The cubic root of 28434425 is about 305.2212852610.

The spelling of 28434425 in words is "twenty-eight million, four hundred thirty-four thousand, four hundred twenty-five".