261239622 has 16 divisors (see below), whose sum is σ = 597119232. Its totient is φ = 74639880.

The previous prime is 261239617. The next prime is 261239687. The reversal of 261239622 is 226932162.

261239622 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×261239622² = 136492280205405768, which contains 22 as substring.

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, 3109954 + ... + 3110037.

It is an arithmetic number, because the mean of its divisors is an integer number (37319952).

Almost surely, 2^261239622 is an apocalyptic number.

261239622 is an abundant number, since it is smaller than the sum of its proper divisors (335879610).

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

261239622 is a wasteful number, since it uses less digits than its factorization.

261239622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6220003.

The product of its digits is 15552, while the sum is 33.

The square root of 261239622 is about 16162.9088347364. The cubic root of 261239622 is about 639.2631673088.

The spelling of 261239622 in words is "two hundred sixty-one million, two hundred thirty-nine thousand, six hundred twenty-two".