28153434 has 16 divisors (see below), whose sum is σ = 56986272. Its totient is φ = 9271248.

The previous prime is 28153427. The next prime is 28153439. The reversal of 28153434 is 43435182.

It is not an unprimeable number, because it can be changed into a prime (28153439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27769 + ... + 28764.

It is an arithmetic number, because the mean of its divisors is an integer number (3561642).

Almost surely, 2^28153434 is an apocalyptic number.

28153434 is an abundant number, since it is smaller than the sum of its proper divisors (28832838).

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

28153434 is a wasteful number, since it uses less digits than its factorization.

28153434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56621.

The product of its digits is 11520, while the sum is 30.

The square root of 28153434 is about 5305.9809649112. The cubic root of 28153434 is about 304.2125490135.

The spelling of 28153434 in words is "twenty-eight million, one hundred fifty-three thousand, four hundred thirty-four".