78572028 has 48 divisors (see below), whose sum is σ = 194745600. Its totient is φ = 24570624.

The previous prime is 78572009. The next prime is 78572029. The reversal of 78572028 is 82027587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78572029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121875 + ... + 122517.

It is an arithmetic number, because the mean of its divisors is an integer number (4057200).

Almost surely, 2^78572028 is an apocalyptic number.

It is an amenable number.

78572028 is an abundant number, since it is smaller than the sum of its proper divisors (116173572).

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

78572028 is a wasteful number, since it uses less digits than its factorization.

78572028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266 (or 1264 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 78572028 is about 8864.0864165463. The cubic root of 78572028 is about 428.3078040302.

The spelling of 78572028 in words is "seventy-eight million, five hundred seventy-two thousand, twenty-eight".