28232464 has 60 divisors (see below), whose sum is σ = 60655716. Its totient is φ = 12719616.

The previous prime is 28232419. The next prime is 28232471. The reversal of 28232464 is 46423282.

It can be written as a sum of positive squares in 6 ways, for example, as 57600 + 28174864 = 240^2 + 5308^2 .

It is a super-2 number, since 2×28232464² = 1594144047022592, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143214 + ... + 143410.

Almost surely, 2^28232464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28232464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30327858).

28232464 is an abundant number, since it is smaller than the sum of its proper divisors (32423252).

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

28232464 is a wasteful number, since it uses less digits than its factorization.

28232464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 265 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

The square root of 28232464 is about 5313.4230021710. The cubic root of 28232464 is about 304.4969365427.

The spelling of 28232464 in words is "twenty-eight million, two hundred thirty-two thousand, four hundred sixty-four".