26406890 has 8 divisors (see below), whose sum is σ = 47532420. Its totient is φ = 10562752.

The previous prime is 26406889. The next prime is 26406901. The reversal of 26406890 is 9860462.

It can be written as a sum of positive squares in 2 ways, for example, as 23843689 + 2563201 = 4883^2 + 1601^2 .

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

It is a super-4 number, since 4×26406890⁴ (a number of 31 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26406890.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1320335 + ... + 1320354.

Almost surely, 2^26406890 is an apocalyptic number.

26406890 is a deficient number, since it is larger than the sum of its proper divisors (21125530).

26406890 is a wasteful number, since it uses less digits than its factorization.

26406890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640696.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 26406890 is about 5138.7634699410. The cubic root of 26406890 is about 297.7870120504.

The spelling of 26406890 in words is "twenty-six million, four hundred six thousand, eight hundred ninety".