261433088 has 72 divisors (see below), whose sum is σ = 622422528. Its totient is φ = 107154432.

The previous prime is 261433049. The next prime is 261433091. The reversal of 261433088 is 880334162.

It is a happy number.

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, 38045 + ... + 44387.

Almost surely, 2^261433088 is an apocalyptic number.

261433088 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261433088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311211264).

261433088 is an abundant number, since it is smaller than the sum of its proper divisors (360989440).

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

261433088 is an equidigital number, since it uses as much as digits as its factorization.

261433088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6389 (or 6375 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 261433088 is about 16168.8926027728. The cubic root of 261433088 is about 639.4209345589.

The spelling of 261433088 in words is "two hundred sixty-one million, four hundred thirty-three thousand, eighty-eight".