84456490 has 8 divisors (see below), whose sum is σ = 152021700. Its totient is φ = 33782592.

The previous prime is 84456487. The next prime is 84456499. The reversal of 84456490 is 9465448.

It can be written as a sum of positive squares in 2 ways, for example, as 84437721 + 18769 = 9189^2 + 137^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (84456499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4222815 + ... + 4222834.

Almost surely, 2^84456490 is an apocalyptic number.

84456490 is a deficient number, since it is larger than the sum of its proper divisors (67565210).

84456490 is a wasteful number, since it uses less digits than its factorization.

84456490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8445656.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 84456490 is about 9190.0212186915. The cubic root of 84456490 is about 438.7438171979.

The spelling of 84456490 in words is "eighty-four million, four hundred fifty-six thousand, four hundred ninety".