26451630 has 48 divisors (see below), whose sum is σ = 70763760. Its totient is φ = 7031232.

The previous prime is 26451619. The next prime is 26451637. The reversal of 26451630 is 3615462.

26451630 is a `hidden beast` number, since 2 + 645 + 16 + 3 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 26451594 and 26451603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26451637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84354 + ... + 84666.

It is an arithmetic number, because the mean of its divisors is an integer number (1474245).

Almost surely, 2^26451630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26451630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35381880).

26451630 is an abundant number, since it is smaller than the sum of its proper divisors (44312130).

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

26451630 is an equidigital number, since it uses as much as digits as its factorization.

26451630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 26451630 is about 5143.1148149735. The cubic root of 26451630 is about 297.9550928532.

Multiplying 26451630 by its product of nonzero digits (4320), we get a square (114271041600 = 338040²).

The spelling of 26451630 in words is "twenty-six million, four hundred fifty-one thousand, six hundred thirty".