261493902 has 24 divisors (see below), whose sum is σ = 568784736. Its totient is φ = 86823936.

The previous prime is 261493901. The next prime is 261493931. The reversal of 261493902 is 209394162.

261493902 is a `hidden beast` number, since 2 + 614 + 9 + 39 + 0 + 2 = 666.

261493902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261493901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23638 + ... + 32889.

It is an arithmetic number, because the mean of its divisors is an integer number (23699364).

Almost surely, 2^261493902 is an apocalyptic number.

261493902 is an abundant number, since it is smaller than the sum of its proper divisors (307290834).

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

261493902 is a wasteful number, since it uses less digits than its factorization.

261493902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56792 (or 56789 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 261493902 is about 16170.7730798500. The cubic root of 261493902 is about 639.4705109536.

The spelling of 261493902 in words is "two hundred sixty-one million, four hundred ninety-three thousand, nine hundred two".