26190640 has 40 divisors (see below), whose sum is σ = 69593760. Its totient is φ = 8979456.

The previous prime is 26190623. The next prime is 26190641. The reversal of 26190640 is 4609162.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 26190599 and 26190608.

It is not an unprimeable number, because it can be changed into a prime (26190641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22825 + ... + 23944.

It is an arithmetic number, because the mean of its divisors is an integer number (1739844).

Almost surely, 2^26190640 is an apocalyptic number.

26190640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26190640 is an abundant number, since it is smaller than the sum of its proper divisors (43403120).

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

26190640 is a wasteful number, since it uses less digits than its factorization.

26190640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46789 (or 46783 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 26190640 is about 5117.6791614950. The cubic root of 26190640 is about 296.9719087505.

The spelling of 26190640 in words is "twenty-six million, one hundred ninety thousand, six hundred forty".