85781430 has 168 divisors, whose sum is σ = 271186416. Its totient is φ = 19128960.

The previous prime is 85781411. The next prime is 85781459. The reversal of 85781430 is 3418758.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 2092210 + ... + 2092250.

Almost surely, 2^85781430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85781430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135593208).

85781430 is an abundant number, since it is smaller than the sum of its proper divisors (185404986).

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

85781430 is an equidigital number, since it uses as much as digits as its factorization.

85781430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 85781430 is about 9261.8264937322. The cubic root of 85781430 is about 441.0262375060.

The spelling of 85781430 in words is "eighty-five million, seven hundred eighty-one thousand, four hundred thirty".