28493961 has 8 divisors (see below), whose sum is σ = 38559264. Its totient is φ = 18712320.

The previous prime is 28493951. The next prime is 28493963. The reversal of 28493961 is 16939482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28493961 - 2⁶ = 28493897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28493963) 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, 70680 + ... + 71081.

It is an arithmetic number, because the mean of its divisors is an integer number (4819908).

Almost surely, 2^28493961 is an apocalyptic number.

It is an amenable number.

28493961 is a deficient number, since it is larger than the sum of its proper divisors (10065303).

28493961 is a wasteful number, since it uses less digits than its factorization.

28493961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141831.

The product of its digits is 93312, while the sum is 42.

The square root of 28493961 is about 5337.9734918787. The cubic root of 28493961 is about 305.4341608694.

The spelling of 28493961 in words is "twenty-eight million, four hundred ninety-three thousand, nine hundred sixty-one".