78828037 has 4 divisors (see below), whose sum is σ = 79551340. Its totient is φ = 78104736.

The previous prime is 78827999. The next prime is 78828053. The reversal of 78828037 is 73082887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73082887 = 59 ⋅1238693.

It can be written as a sum of positive squares in 2 ways, for example, as 65512836 + 13315201 = 8094^2 + 3649^2 .

It is a cyclic number.

It is not a de Polignac number, because 78828037 - 2¹⁹ = 78303749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78827984 and 78828002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78828097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361488 + ... + 361705.

It is an arithmetic number, because the mean of its divisors is an integer number (19887835).

Almost surely, 2^78828037 is an apocalyptic number.

It is an amenable number.

78828037 is a deficient number, since it is larger than the sum of its proper divisors (723303).

78828037 is a wasteful number, since it uses less digits than its factorization.

78828037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723302.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 78828037 is about 8878.5154727578. The cubic root of 78828037 is about 428.7724807520.

The spelling of 78828037 in words is "seventy-eight million, eight hundred twenty-eight thousand, thirty-seven".