86440420 has 24 divisors (see below), whose sum is σ = 198027648. Its totient is φ = 31432800.

The previous prime is 86440411. The next prime is 86440429. The reversal of 86440420 is 2404468.

It is an interprime number because it is at equal distance from previous prime (86440411) and next prime (86440429).

It is not an unprimeable number, because it can be changed into a prime (86440429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196236 + ... + 196675.

It is an arithmetic number, because the mean of its divisors is an integer number (8251152).

Almost surely, 2^86440420 is an apocalyptic number.

It is an amenable number.

86440420 is an abundant number, since it is smaller than the sum of its proper divisors (111587228).

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

86440420 is a wasteful number, since it uses less digits than its factorization.

86440420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392931 (or 392929 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 86440420 is about 9297.3340264831. The cubic root of 86440420 is about 442.1527082342.

Adding to 86440420 its reverse (2404468), we get a palindrome (88844888).

The spelling of 86440420 in words is "eighty-six million, four hundred forty thousand, four hundred twenty".