25278030 has 48 divisors (see below), whose sum is σ = 67508064. Its totient is φ = 6557760.

The previous prime is 25277971. The next prime is 25278049. The reversal of 25278030 is 3087252.

It is a junction number, because it is equal to n+sod(n) for n = 25277985 and 25278003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 466 + ... + 7125.

It is an arithmetic number, because the mean of its divisors is an integer number (1406418).

Almost surely, 2^25278030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25278030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33754032).

25278030 is an abundant number, since it is smaller than the sum of its proper divisors (42230034).

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

25278030 is a wasteful number, since it uses less digits than its factorization.

25278030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7641 (or 7638 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 25278030 is about 5027.7261261926. The cubic root of 25278030 is about 293.4817330489.

The spelling of 25278030 in words is "twenty-five million, two hundred seventy-eight thousand, thirty".