261868002 has 32 divisors (see below), whose sum is σ = 573122304. Its totient is φ = 79107600.

The previous prime is 261867989. The next prime is 261868027. The reversal of 261868002 is 200868162.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 15853 + ... + 27839.

It is an arithmetic number, because the mean of its divisors is an integer number (17910072).

Almost surely, 2^261868002 is an apocalyptic number.

261868002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261868002 is an abundant number, since it is smaller than the sum of its proper divisors (311254302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261868002 is a wasteful number, since it uses less digits than its factorization.

261868002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12334.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 261868002 is about 16182.3361107103. The cubic root of 261868002 is about 639.7753133805.

The spelling of 261868002 in words is "two hundred sixty-one million, eight hundred sixty-eight thousand, two".