84577428 has 72 divisors (see below), whose sum is σ = 232214528. Its totient is φ = 25800768.

The previous prime is 84577411. The next prime is 84577439. The reversal of 84577428 is 82477548.

Its product of digits (501760) is a multiple of the sum of its prime divisors (1568).

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, 58725 + ... + 60147.

Almost surely, 2^84577428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84577428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116107264).

84577428 is an abundant number, since it is smaller than the sum of its proper divisors (147637100).

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

84577428 is a wasteful number, since it uses less digits than its factorization.

84577428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573 (or 1568 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 84577428 is about 9196.5987190917. The cubic root of 84577428 is about 438.9531379696.

The spelling of 84577428 in words is "eighty-four million, five hundred seventy-seven thousand, four hundred twenty-eight".