26040278628 has 384 divisors, whose sum is σ = 86575677440. Its totient is φ = 6584094720.

The previous prime is 26040278599. The next prime is 26040278629. The reversal of 26040278628 is 82687204062.

It is a super-2 number, since 2×26040278628² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26040278629) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 38692500 + ... + 38693172.

Almost surely, 2^26040278628 is an apocalyptic number.

26040278628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26040278628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43287838720).

26040278628 is an abundant number, since it is smaller than the sum of its proper divisors (60535398812).

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

26040278628 is a wasteful number, since it uses less digits than its factorization.

26040278628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 26040278628 in words is "twenty-six billion, forty million, two hundred seventy-eight thousand, six hundred twenty-eight".