28457961 has 32 divisors (see below), whose sum is σ = 45480960. Its totient is φ = 15484224.

The previous prime is 28457941. The next prime is 28457963. The reversal of 28457961 is 16975482.

It is not a de Polignac number, because 28457961 - 2⁵ = 28457929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28457963) 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, 50266 + ... + 50828.

It is an arithmetic number, because the mean of its divisors is an integer number (1421280).

Almost surely, 2^28457961 is an apocalyptic number.

28457961 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28457961 is a deficient number, since it is larger than the sum of its proper divisors (17022999).

28457961 is a wasteful number, since it uses less digits than its factorization.

28457961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685.

The product of its digits is 120960, while the sum is 42.

The square root of 28457961 is about 5334.6003599145. The cubic root of 28457961 is about 305.3054755460.

The spelling of 28457961 in words is "twenty-eight million, four hundred fifty-seven thousand, nine hundred sixty-one".