78358480 has 20 divisors (see below), whose sum is σ = 182183652. Its totient is φ = 31343360.

The previous prime is 78358477. The next prime is 78358487. The reversal of 78358480 is 8485387.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28005264 + 50353216 = 5292^2 + 7096^2 .

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

It is a super-2 number, since 2×78358480² = 12280102775820800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78358487) 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, 489661 + ... + 489820.

Almost surely, 2^78358480 is an apocalyptic number.

It is an amenable number.

78358480 is an abundant number, since it is smaller than the sum of its proper divisors (103825172).

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

78358480 is a wasteful number, since it uses less digits than its factorization.

78358480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979494 (or 979488 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 78358480 is about 8852.0325349605. The cubic root of 78358480 is about 427.9194246665.

The spelling of 78358480 in words is "seventy-eight million, three hundred fifty-eight thousand, four hundred eighty".