86211390 has 64 divisors (see below), whose sum is σ = 214617600. Its totient is φ = 22149504.

The previous prime is 86211373. The next prime is 86211409. The reversal of 86211390 is 9311268.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93351 + ... + 94269.

It is an arithmetic number, because the mean of its divisors is an integer number (3353400).

Almost surely, 2^86211390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86211390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107308800).

86211390 is an abundant number, since it is smaller than the sum of its proper divisors (128406210).

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

86211390 is a wasteful number, since it uses less digits than its factorization.

86211390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 86211390 is about 9285.0088852946. The cubic root of 86211390 is about 441.7618578889.

It can be divided in two parts, 8621 and 1390, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 86211390 in words is "eighty-six million, two hundred eleven thousand, three hundred ninety".