26378961 has 16 divisors (see below), whose sum is σ = 40320000. Its totient is φ = 15027408.

The previous prime is 26378941. The next prime is 26378993. The reversal of 26378961 is 16987362.

It is a happy number.

It is not a de Polignac number, because 26378961 - 2⁵ = 26378929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26378921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5790 + ... + 9288.

It is an arithmetic number, because the mean of its divisors is an integer number (2520000).

Almost surely, 2^26378961 is an apocalyptic number.

26378961 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26378961 is a deficient number, since it is larger than the sum of its proper divisors (13941039).

26378961 is a wasteful number, since it uses less digits than its factorization.

26378961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3868.

The product of its digits is 108864, while the sum is 42.

The square root of 26378961 is about 5136.0452684921. The cubic root of 26378961 is about 297.6819911350.

The spelling of 26378961 in words is "twenty-six million, three hundred seventy-eight thousand, nine hundred sixty-one".