261392396 has 12 divisors (see below), whose sum is σ = 466067952. Its totient is φ = 128230128.

The previous prime is 261392389. The next prime is 261392437. The reversal of 261392396 is 693293162.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616280 + ... + 616703.

It is an arithmetic number, because the mean of its divisors is an integer number (38838996).

Almost surely, 2^261392396 is an apocalyptic number.

It is an amenable number.

261392396 is a deficient number, since it is larger than the sum of its proper divisors (204675556).

261392396 is a wasteful number, since it uses less digits than its factorization.

261392396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233040 (or 1233038 counting only the distinct ones).

The product of its digits is 104976, while the sum is 41.

The square root of 261392396 is about 16167.6342115969. The cubic root of 261392396 is about 639.3877575970.

The spelling of 261392396 in words is "two hundred sixty-one million, three hundred ninety-two thousand, three hundred ninety-six".