84238457 has 4 divisors (see below), whose sum is σ = 88672080. Its totient is φ = 79804836.

The previous prime is 84238421. The next prime is 84238459. The reversal of 84238457 is 75483248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84238457 - 2⁸ = 84238201 is a prime.

It is a super-2 number, since 2×84238457² = 14192235275481698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84238459) 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 3 ways as a sum of consecutive naturals, for example, 2216783 + ... + 2216820.

It is an arithmetic number, because the mean of its divisors is an integer number (22168020).

Almost surely, 2^84238457 is an apocalyptic number.

It is an amenable number.

84238457 is a deficient number, since it is larger than the sum of its proper divisors (4433623).

84238457 is a wasteful number, since it uses less digits than its factorization.

84238457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433622.

The product of its digits is 215040, while the sum is 41.

The square root of 84238457 is about 9178.1510665275. The cubic root of 84238457 is about 438.3659379366.

The spelling of 84238457 in words is "eighty-four million, two hundred thirty-eight thousand, four hundred fifty-seven".