261337828 has 6 divisors (see below), whose sum is σ = 457341206. Its totient is φ = 130668912.

The previous prime is 261337823. The next prime is 261337841. The reversal of 261337828 is 828733162.

It can be written as a sum of positive squares in only one way, i.e., 208455844 + 52881984 = 14438^2 + 7272^2 .

It is not an unprimeable number, because it can be changed into a prime (261337823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32667225 + ... + 32667232.

Almost surely, 2^261337828 is an apocalyptic number.

It is an amenable number.

261337828 is a deficient number, since it is larger than the sum of its proper divisors (196003378).

261337828 is a wasteful number, since it uses less digits than its factorization.

261337828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65334461 (or 65334459 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 261337828 is about 16165.9465544087. The cubic root of 261337828 is about 639.3432618634.

The spelling of 261337828 in words is "two hundred sixty-one million, three hundred thirty-seven thousand, eight hundred twenty-eight".