28894425 has 48 divisors (see below), whose sum is σ = 55805952. Its totient is φ = 12916800.

The previous prime is 28894423. The next prime is 28894427. The reversal of 28894425 is 52449882.

It is an interprime number because it is at equal distance from previous prime (28894423) and next prime (28894427).

It is not a de Polignac number, because 28894425 - 2¹ = 28894423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28894423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24090 + ... + 25260.

It is an arithmetic number, because the mean of its divisors is an integer number (1162624).

Almost surely, 2^28894425 is an apocalyptic number.

28894425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28894425 is a deficient number, since it is larger than the sum of its proper divisors (26911527).

28894425 is a wasteful number, since it uses less digits than its factorization.

28894425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238 (or 1233 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 28894425 is about 5375.3534767492. The cubic root of 28894425 is about 306.8584018106.

It can be divided in two parts, 28 and 894425, that added together give a triangular number (894453 = T₁₃₃₇).

The spelling of 28894425 in words is "twenty-eight million, eight hundred ninety-four thousand, four hundred twenty-five".