78416930 has 8 divisors (see below), whose sum is σ = 141150492. Its totient is φ = 31366768.

The previous prime is 78416927. The next prime is 78416939. The reversal of 78416930 is 3961487.

It can be written as a sum of positive squares in 2 ways, for example, as 78340201 + 76729 = 8851^2 + 277^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78416930² = 12298429821249800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78416939) 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, 3920837 + ... + 3920856.

Almost surely, 2^78416930 is an apocalyptic number.

78416930 is a deficient number, since it is larger than the sum of its proper divisors (62733562).

78416930 is a wasteful number, since it uses less digits than its factorization.

78416930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7841700.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 78416930 is about 8855.3334211649. Note that the first 3 decimals coincide. The cubic root of 78416930 is about 428.0257976415.

The spelling of 78416930 in words is "seventy-eight million, four hundred sixteen thousand, nine hundred thirty".