84918580 has 12 divisors (see below), whose sum is σ = 178329060. Its totient is φ = 33967424.

The previous prime is 84918551. The next prime is 84918629. The reversal of 84918580 is 8581948.

It can be written as a sum of positive squares in 2 ways, for example, as 12362256 + 72556324 = 3516^2 + 8518^2 .

It is a super-2 number, since 2×84918580² = 14422330458432800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2122945 + ... + 2122984.

It is an arithmetic number, because the mean of its divisors is an integer number (14860755).

Almost surely, 2^84918580 is an apocalyptic number.

It is an amenable number.

84918580 is an abundant number, since it is smaller than the sum of its proper divisors (93410480).

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

84918580 is a wasteful number, since it uses less digits than its factorization.

84918580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4245938 (or 4245936 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 84918580 is about 9215.1277799063. The cubic root of 84918580 is about 439.5425341818.

It can be divided in two parts, 8491 and 8580, that added together give a palindrome (17071).

The spelling of 84918580 in words is "eighty-four million, nine hundred eighteen thousand, five hundred eighty".