28325040 has 80 divisors (see below), whose sum is σ = 88708608. Its totient is φ = 7475968.

The previous prime is 28325027. The next prime is 28325053. The reversal of 28325040 is 4052382.

It is an interprime number because it is at equal distance from previous prime (28325027) and next prime (28325053).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 28325040.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25129 + ... + 26231.

Almost surely, 2^28325040 is an apocalyptic number.

28325040 is a gapful number since it is divisible by the number (20) 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 28325040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44354304).

28325040 is an abundant number, since it is smaller than the sum of its proper divisors (60383568).

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

28325040 is a wasteful number, since it uses less digits than its factorization.

28325040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226 (or 1220 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 28325040 is about 5322.1273941912. The cubic root of 28325040 is about 304.8293948683.

The spelling of 28325040 in words is "twenty-eight million, three hundred twenty-five thousand, forty".