25779390 has 192 divisors, whose sum is σ = 82736640. Its totient is φ = 5080320.

The previous prime is 25779379. The next prime is 25779407. The reversal of 25779390 is 9397752.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 363055 + ... + 363125.

It is an arithmetic number, because the mean of its divisors is an integer number (430920).

Almost surely, 2^25779390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25779390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41368320).

25779390 is an abundant number, since it is smaller than the sum of its proper divisors (56957250).

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

25779390 is a wasteful number, since it uses less digits than its factorization.

25779390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 119070, while the sum is 42.

The square root of 25779390 is about 5077.3408394552. The cubic root of 25779390 is about 295.4093331283.

The spelling of 25779390 in words is "twenty-five million, seven hundred seventy-nine thousand, three hundred ninety".