261934404 has 48 divisors (see below), whose sum is σ = 630260736. Its totient is φ = 84614400.

The previous prime is 261934391. The next prime is 261934417. The reversal of 261934404 is 404439162.

It is an interprime number because it is at equal distance from previous prime (261934391) and next prime (261934417).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75549 + ... + 78939.

It is an arithmetic number, because the mean of its divisors is an integer number (13130432).

Almost surely, 2^261934404 is an apocalyptic number.

It is an amenable number.

261934404 is an abundant number, since it is smaller than the sum of its proper divisors (368326332).

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

261934404 is a wasteful number, since it uses less digits than its factorization.

261934404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3596 (or 3594 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 261934404 is about 16184.3876621885. The cubic root of 261934404 is about 639.8293848589.

The spelling of 261934404 in words is "two hundred sixty-one million, nine hundred thirty-four thousand, four hundred four".