26400634 has 8 divisors (see below), whose sum is σ = 42647220. Its totient is φ = 12184896.

The previous prime is 26400631. The next prime is 26400653. The reversal of 26400634 is 43600462.

It can be written as a sum of positive squares in 2 ways, for example, as 23668225 + 2732409 = 4865^2 + 1653^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 26400599 and 26400608.

It is not an unprimeable number, because it can be changed into a prime (26400631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507679 + ... + 507730.

Almost surely, 2^26400634 is an apocalyptic number.

26400634 is a deficient number, since it is larger than the sum of its proper divisors (16246586).

26400634 is a wasteful number, since it uses less digits than its factorization.

26400634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015424.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 26400634 is about 5138.1547271370. The cubic root of 26400634 is about 297.7634941644.

The spelling of 26400634 in words is "twenty-six million, four hundred thousand, six hundred thirty-four".