78278050 has 12 divisors (see below), whose sum is σ = 145597266. Its totient is φ = 31311200.

The previous prime is 78278033. The next prime is 78278071. The reversal of 78278050 is 5087287.

It can be written as a sum of positive squares in 3 ways, for example, as 58537801 + 19740249 = 7651^2 + 4443^2 .

It is a super-2 number, since 2×78278050² = 12254906223605000, which contains 22 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 782731 + ... + 782830.

Almost surely, 2^78278050 is an apocalyptic number.

78278050 is a deficient number, since it is larger than the sum of its proper divisors (67319216).

78278050 is a wasteful number, since it uses less digits than its factorization.

78278050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565573 (or 1565568 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 78278050 is about 8847.4883441573. The cubic root of 78278050 is about 427.7729638458.

The spelling of 78278050 in words is "seventy-eight million, two hundred seventy-eight thousand, fifty".