28131254 has 8 divisors (see below), whose sum is σ = 44031600. Its totient is φ = 13454056.

The previous prime is 28131253. The next prime is 28131283. The reversal of 28131254 is 45213182.

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

It is a super-2 number, since 2×28131254² = 1582734903225032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28131251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305729 + ... + 305820.

It is an arithmetic number, because the mean of its divisors is an integer number (5503950).

Almost surely, 2^28131254 is an apocalyptic number.

28131254 is a deficient number, since it is larger than the sum of its proper divisors (15900346).

28131254 is a wasteful number, since it uses less digits than its factorization.

28131254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611574.

The product of its digits is 1920, while the sum is 26.

The square root of 28131254 is about 5303.8904588990. The cubic root of 28131254 is about 304.1326391992.

The spelling of 28131254 in words is "twenty-eight million, one hundred thirty-one thousand, two hundred fifty-four".