84489390 has 48 divisors (see below), whose sum is σ = 231238800. Its totient is φ = 21344256.

The previous prime is 84489347. The next prime is 84489437. The reversal of 84489390 is 9398448.

It is a happy number.

84489390 is a `hidden beast` number, since 84 + 489 + 3 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22995 + ... + 26414.

It is an arithmetic number, because the mean of its divisors is an integer number (4817475).

Almost surely, 2^84489390 is an apocalyptic number.

84489390 is an abundant number, since it is smaller than the sum of its proper divisors (146749410).

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

84489390 is a wasteful number, since it uses less digits than its factorization.

84489390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49441 (or 49438 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 84489390 is about 9191.8110293891. The cubic root of 84489390 is about 438.8007806420.

The spelling of 84489390 in words is "eighty-four million, four hundred eighty-nine thousand, three hundred ninety".