261393902 has 32 divisors (see below), whose sum is σ = 490938624. Its totient is φ = 101404800.

The previous prime is 261393893. The next prime is 261393917. The reversal of 261393902 is 209393162.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 33593 + ... + 40635.

It is an arithmetic number, because the mean of its divisors is an integer number (15341832).

Almost surely, 2^261393902 is an apocalyptic number.

261393902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261393902 is a deficient number, since it is larger than the sum of its proper divisors (229544722).

261393902 is a wasteful number, since it uses less digits than its factorization.

261393902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7304.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 261393902 is about 16167.6807860621. The cubic root of 261393902 is about 639.3889855288.

The spelling of 261393902 in words is "two hundred sixty-one million, three hundred ninety-three thousand, nine hundred two".