260426640 has 40 divisors (see below), whose sum is σ = 807323328. Its totient is φ = 69447040.

The previous prime is 260426633. The next prime is 260426669. The reversal of 260426640 is 46624062.

260426640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (30).

It is a junction number, because it is equal to n+sod(n) for n = 260426598 and 260426607.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 542316 + ... + 542795.

Almost surely, 2^260426640 is an apocalyptic number.

260426640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

260426640 is an abundant number, since it is smaller than the sum of its proper divisors (546896688).

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

260426640 is a wasteful number, since it uses less digits than its factorization.

260426640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085127 (or 1085121 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 260426640 is about 16137.7396186703. The cubic root of 260426640 is about 638.5993457273.

The spelling of 260426640 in words is "two hundred sixty million, four hundred twenty-six thousand, six hundred forty".