26169940 has 12 divisors (see below), whose sum is σ = 54956916. Its totient is φ = 10467968.

The previous prime is 26169937. The next prime is 26169943. The reversal of 26169940 is 4996162.

It is an interprime number because it is at equal distance from previous prime (26169937) and next prime (26169943).

It can be written as a sum of positive squares in 2 ways, for example, as 17205904 + 8964036 = 4148^2 + 2994^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 26169940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26169943) 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, 654229 + ... + 654268.

It is an arithmetic number, because the mean of its divisors is an integer number (4579743).

Almost surely, 2^26169940 is an apocalyptic number.

26169940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26169940 is an abundant number, since it is smaller than the sum of its proper divisors (28786976).

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

26169940 is a wasteful number, since it uses less digits than its factorization.

26169940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308506 (or 1308504 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 26169940 is about 5115.6563606247. The cubic root of 26169940 is about 296.8936500195.

Subtracting from 26169940 its reverse (4996162), we obtain a triangular number (21173778 = T₆₅₀₇).

The spelling of 26169940 in words is "twenty-six million, one hundred sixty-nine thousand, nine hundred forty".