28531426 has 64 divisors (see below), whose sum is σ = 57600000. Its totient is φ = 10478160.

The previous prime is 28531417. The next prime is 28531427. The reversal of 28531426 is 62413582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28531427) 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, 143275 + ... + 143473.

It is an arithmetic number, because the mean of its divisors is an integer number (900000).

Almost surely, 2^28531426 is an apocalyptic number.

28531426 is an abundant number, since it is smaller than the sum of its proper divisors (29068574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28531426 is a wasteful number, since it uses less digits than its factorization.

28531426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 238 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 28531426 is about 5341.4816296604. The cubic root of 28531426 is about 305.5679679268.

It can be divided in two parts, 2853 and 1426, that multiplied together give a triangular number (4068378 = T₂₈₅₂).

The spelling of 28531426 in words is "twenty-eight million, five hundred thirty-one thousand, four hundred twenty-six".