84430381 has 24 divisors (see below), whose sum is σ = 105390720. Its totient is φ = 67197312.

The previous prime is 84430369. The next prime is 84430393. The reversal of 84430381 is 18303448.

It is an interprime number because it is at equal distance from previous prime (84430369) and next prime (84430393).

It is not a de Polignac number, because 84430381 - 2⁵ = 84430349 is a prime.

It is a super-2 number, since 2×84430381² = 14256978471610322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84430351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65166 + ... + 66448.

It is an arithmetic number, because the mean of its divisors is an integer number (4391280).

Almost surely, 2^84430381 is an apocalyptic number.

It is an amenable number.

84430381 is a deficient number, since it is larger than the sum of its proper divisors (20960339).

84430381 is a wasteful number, since it uses less digits than its factorization.

84430381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393 (or 1386 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 84430381 is about 9188.6006007444. The cubic root of 84430381 is about 438.6986012414.

The spelling of 84430381 in words is "eighty-four million, four hundred thirty thousand, three hundred eighty-one".