261875630 has 24 divisors (see below), whose sum is σ = 479564712. Its totient is φ = 102961136.

The previous prime is 261875629. The next prime is 261875639. The reversal of 261875630 is 36578162.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261875639) 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, 31049 + ... + 38571.

It is an arithmetic number, because the mean of its divisors is an integer number (19981863).

Almost surely, 2^261875630 is an apocalyptic number.

261875630 is a deficient number, since it is larger than the sum of its proper divisors (217689082).

261875630 is an equidigital number, since it uses as much as digits as its factorization.

261875630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7648 (or 7589 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 261875630 is about 16182.5717980796. The cubic root of 261875630 is about 639.7815253634.

The spelling of 261875630 in words is "two hundred sixty-one million, eight hundred seventy-five thousand, six hundred thirty".