25378656 has 48 divisors (see below), whose sum is σ = 67060224. Its totient is φ = 8403584.

The previous prime is 25378649. The next prime is 25378657. The reversal of 25378656 is 65687352.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25378657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15241 + ... + 16823.

It is an arithmetic number, because the mean of its divisors is an integer number (1397088).

Almost surely, 2^25378656 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 25378656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33530112).

25378656 is an abundant number, since it is smaller than the sum of its proper divisors (41681568).

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

25378656 is a wasteful number, since it uses less digits than its factorization.

25378656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763 (or 1755 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 25378656 is about 5037.7232952992. The cubic root of 25378656 is about 293.8706451168.

The spelling of 25378656 in words is "twenty-five million, three hundred seventy-eight thousand, six hundred fifty-six".