25533480 has 128 divisors (see below), whose sum is σ = 88646400. Its totient is φ = 5763072.

The previous prime is 25533467. The next prime is 25533481. The reversal of 25533480 is 8433552.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25533481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94786 + ... + 95054.

It is an arithmetic number, because the mean of its divisors is an integer number (692550).

Almost surely, 2^25533480 is an apocalyptic number.

25533480 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 25533480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44323200).

25533480 is an abundant number, since it is smaller than the sum of its proper divisors (63112920).

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

25533480 is a wasteful number, since it uses less digits than its factorization.

25533480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 25533480 is about 5053.0663957641. The cubic root of 25533480 is about 294.4670257855.

The spelling of 25533480 in words is "twenty-five million, five hundred thirty-three thousand, four hundred eighty".