78174090 has 48 divisors (see below), whose sum is σ = 204071400. Its totient is φ = 20762496.

The previous prime is 78174077. The next prime is 78174091. The reversal of 78174090 is 9047187.

It can be written as a sum of positive squares in 4 ways, for example, as 35676729 + 42497361 = 5973^2 + 6519^2 .

It is a super-2 number, since 2×78174090² = 12222376694656200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78174091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22596 + ... + 25824.

Almost surely, 2^78174090 is an apocalyptic number.

78174090 is an abundant number, since it is smaller than the sum of its proper divisors (125897310).

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

78174090 is a wasteful number, since it uses less digits than its factorization.

78174090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511 (or 3508 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 78174090 is about 8841.6112784944. The cubic root of 78174090 is about 427.5835068222.

The spelling of 78174090 in words is "seventy-eight million, one hundred seventy-four thousand, ninety".