84178480 has 20 divisors (see below), whose sum is σ = 195715152. Its totient is φ = 33671360.

The previous prime is 84178463. The next prime is 84178487. The reversal of 84178480 is 8487148.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×84178480² = 14172032990220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (84178487) 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, 526036 + ... + 526195.

Almost surely, 2^84178480 is an apocalyptic number.

84178480 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84178480 is an abundant number, since it is smaller than the sum of its proper divisors (111536672).

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

84178480 is a wasteful number, since it uses less digits than its factorization.

84178480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052244 (or 1052238 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 84178480 is about 9174.8831055224. The cubic root of 84178480 is about 438.2618757417.

The spelling of 84178480 in words is "eighty-four million, one hundred seventy-eight thousand, four hundred eighty".