1328826261 has 32 divisors (see below), whose sum is σ = 2068485120. Its totient is φ = 743094144.

The previous prime is 1328826241. The next prime is 1328826263. The reversal of 1328826261 is 1626288231.

1328826261 = T₃₇₁ + T₃₇₂ + ... + T₂₀₀₁.

It is not a de Polignac number, because 1328826261 - 2⁷ = 1328826133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328826263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 286386 + ... + 290988.

It is an arithmetic number, because the mean of its divisors is an integer number (64640160).

Almost surely, 2^1328826261 is an apocalyptic number.

It is an amenable number.

1328826261 is a deficient number, since it is larger than the sum of its proper divisors (739658859).

1328826261 is a wasteful number, since it uses less digits than its factorization.

1328826261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4905.

The product of its digits is 55296, while the sum is 39.

The square root of 1328826261 is about 36453.0692946424. The cubic root of 1328826261 is about 1099.4008475397.

The spelling of 1328826261 in words is "one billion, three hundred twenty-eight million, eight hundred twenty-six thousand, two hundred sixty-one".