28732464 has 60 divisors (see below), whose sum is σ = 81754192. Its totient is φ = 9417600.

The previous prime is 28732439. The next prime is 28732477. The reversal of 28732464 is 46423782.

It is a super-2 number, since 2×28732464² = 1651108975022592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 7149 + ... + 10419.

Almost surely, 2^28732464 is an apocalyptic number.

28732464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28732464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40877096).

28732464 is an abundant number, since it is smaller than the sum of its proper divisors (53021728).

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

28732464 is a wasteful number, since it uses less digits than its factorization.

28732464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3346 (or 3337 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 28732464 is about 5360.2671575212. The cubic root of 28732464 is about 306.2839860103.

The spelling of 28732464 in words is "twenty-eight million, seven hundred thirty-two thousand, four hundred sixty-four".