25767990 has 64 divisors (see below), whose sum is σ = 72345600. Its totient is φ = 6508512.

The previous prime is 25767949. The next prime is 25767991. The reversal of 25767990 is 9976752.

25767990 is a `hidden beast` number, since 2 + 576 + 79 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25767991) 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, 2619 + ... + 7641.

It is an arithmetic number, because the mean of its divisors is an integer number (1130400).

Almost surely, 2^25767990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25767990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36172800).

25767990 is an abundant number, since it is smaller than the sum of its proper divisors (46577610).

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

25767990 is a wasteful number, since it uses less digits than its factorization.

25767990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5058 (or 5052 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 25767990 is about 5076.2180804217. The cubic root of 25767990 is about 295.3657820211.

The spelling of 25767990 in words is "twenty-five million, seven hundred sixty-seven thousand, nine hundred ninety".