78134130 has 24 divisors (see below), whose sum is σ = 203148972. Its totient is φ = 20835744.

The previous prime is 78134117. The next prime is 78134131. The reversal of 78134130 is 3143187.

It can be written as a sum of positive squares in 2 ways, for example, as 76895361 + 1238769 = 8769^2 + 1113^2 .

It is a super-2 number, since 2×78134130² = 12209884541713800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78134094 and 78134103.

It is not an unprimeable number, because it can be changed into a prime (78134131) 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 11 ways as a sum of consecutive naturals, for example, 433989 + ... + 434168.

Almost surely, 2^78134130 is an apocalyptic number.

78134130 is an abundant number, since it is smaller than the sum of its proper divisors (125014842).

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

78134130 is a wasteful number, since it uses less digits than its factorization.

78134130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868170 (or 868167 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 78134130 is about 8839.3512205365. The cubic root of 78134130 is about 427.5106389063.

The spelling of 78134130 in words is "seventy-eight million, one hundred thirty-four thousand, one hundred thirty".