39278028 has 12 divisors (see below), whose sum is σ = 91648760. Its totient is φ = 13092672.

The previous prime is 39278027. The next prime is 39278033. The reversal of 39278028 is 82087293.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (39278021) 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, 1636573 + ... + 1636596.

Almost surely, 2^39278028 is an apocalyptic number.

It is an amenable number.

39278028 is an abundant number, since it is smaller than the sum of its proper divisors (52370732).

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

39278028 is a wasteful number, since it uses less digits than its factorization.

39278028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273176 (or 3273174 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 39278028 is about 6267.2185218006. The cubic root of 39278028 is about 339.9250930714.

The spelling of 39278028 in words is "thirty-nine million, two hundred seventy-eight thousand, twenty-eight".