28391754 has 16 divisors (see below), whose sum is σ = 58741920. Its totient is φ = 9137520.

The previous prime is 28391747. The next prime is 28391773. The reversal of 28391754 is 45719382.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81412 + ... + 81759.

It is an arithmetic number, because the mean of its divisors is an integer number (3671370).

Almost surely, 2^28391754 is an apocalyptic number.

28391754 is an abundant number, since it is smaller than the sum of its proper divisors (30350166).

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

28391754 is a wasteful number, since it uses less digits than its factorization.

28391754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163205.

The product of its digits is 60480, while the sum is 39.

The square root of 28391754 is about 5328.3913144588. The cubic root of 28391754 is about 305.0685288996.

The spelling of 28391754 in words is "twenty-eight million, three hundred ninety-one thousand, seven hundred fifty-four".