261030772 has 24 divisors (see below), whose sum is σ = 483206976. Its totient is φ = 123127488.

The previous prime is 261030743. The next prime is 261030787. The reversal of 261030772 is 277030162.

It is a self number, because there is not a number n which added to its sum of digits gives 261030772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12718 + ... + 26149.

It is an arithmetic number, because the mean of its divisors is an integer number (20133624).

Almost surely, 2^261030772 is an apocalyptic number.

It is an amenable number.

261030772 is a deficient number, since it is larger than the sum of its proper divisors (222176204).

261030772 is a wasteful number, since it uses less digits than its factorization.

261030772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38967 (or 38965 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 261030772 is about 16156.4467628250. The cubic root of 261030772 is about 639.0927672933.

The spelling of 261030772 in words is "two hundred sixty-one million, thirty thousand, seven hundred seventy-two".