261384430 has 32 divisors (see below), whose sum is σ = 487837728. Its totient is φ = 100761600.

The previous prime is 261384427. The next prime is 261384449. The reversal of 261384430 is 34483162.

It is a junction number, because it is equal to n+sod(n) for n = 261384392 and 261384401.

It is a congruent number.

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, 30190 + ... + 37870.

It is an arithmetic number, because the mean of its divisors is an integer number (15244929).

Almost surely, 2^261384430 is an apocalyptic number.

261384430 is a deficient number, since it is larger than the sum of its proper divisors (226453298).

261384430 is a wasteful number, since it uses less digits than its factorization.

261384430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7812.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 261384430 is about 16167.3878533299. The cubic root of 261384430 is about 639.3812623627.

The spelling of 261384430 in words is "two hundred sixty-one million, three hundred eighty-four thousand, four hundred thirty".