84390436 has 24 divisors (see below), whose sum is σ = 159556544. Its totient is φ = 38823840.

The previous prime is 84390433. The next prime is 84390437. The reversal of 84390436 is 63409348.

It is a junction number, because it is equal to n+sod(n) for n = 84390395 and 84390404.

It is not an unprimeable number, because it can be changed into a prime (84390433) 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 7 ways as a sum of consecutive naturals, for example, 14761 + ... + 19663.

Almost surely, 2^84390436 is an apocalyptic number.

It is an amenable number.

84390436 is a deficient number, since it is larger than the sum of its proper divisors (75166108).

84390436 is a wasteful number, since it uses less digits than its factorization.

84390436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5251 (or 5249 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 84390436 is about 9186.4267264263. The cubic root of 84390436 is about 438.6294058494.

The spelling of 84390436 in words is "eighty-four million, three hundred ninety thousand, four hundred thirty-six".