261336748 has 24 divisors (see below), whose sum is σ = 473820480. Its totient is φ = 125973120.

The previous prime is 261336743. The next prime is 261336781. The reversal of 261336748 is 847633162.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 261336748.

It is not an unprimeable number, because it can be changed into a prime (261336743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104440 + ... + 106912.

It is an arithmetic number, because the mean of its divisors is an integer number (19742520).

Almost surely, 2^261336748 is an apocalyptic number.

It is an amenable number.

261336748 is a deficient number, since it is larger than the sum of its proper divisors (212483732).

261336748 is a wasteful number, since it uses less digits than its factorization.

261336748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3417 (or 3415 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 261336748 is about 16165.9131508245. The cubic root of 261336748 is about 639.3423811493.

The spelling of 261336748 in words is "two hundred sixty-one million, three hundred thirty-six thousand, seven hundred forty-eight".