78428050 has 12 divisors (see below), whose sum is σ = 145876266. Its totient is φ = 31371200.

The previous prime is 78428027. The next prime is 78428083. The reversal of 78428050 is 5082487.

It can be written as a sum of positive squares in 3 ways, for example, as 73324969 + 5103081 = 8563^2 + 2259^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78427997 and 78428015.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 784231 + ... + 784330.

Almost surely, 2^78428050 is an apocalyptic number.

78428050 is a deficient number, since it is larger than the sum of its proper divisors (67448216).

78428050 is a wasteful number, since it uses less digits than its factorization.

78428050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568573 (or 1568568 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 78428050 is about 8855.9612691113. The cubic root of 78428050 is about 428.0460289100.

The spelling of 78428050 in words is "seventy-eight million, four hundred twenty-eight thousand, fifty".