39628780 has 24 divisors (see below), whose sum is σ = 84363552. Its totient is φ = 15633792.

The previous prime is 39628777. The next prime is 39628783. The reversal of 39628780 is 8782693.

It is an interprime number because it is at equal distance from previous prime (39628777) and next prime (39628783).

It is not an unprimeable number, because it can be changed into a prime (39628783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12112 + ... + 15031.

It is an arithmetic number, because the mean of its divisors is an integer number (3515148).

Almost surely, 2^39628780 is an apocalyptic number.

It is an amenable number.

39628780 is an abundant number, since it is smaller than the sum of its proper divisors (44734772).

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

39628780 is a wasteful number, since it uses less digits than its factorization.

39628780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27225 (or 27223 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 39628780 is about 6295.1393948029. The cubic root of 39628780 is about 340.9339374322.

The spelling of 39628780 in words is "thirty-nine million, six hundred twenty-eight thousand, seven hundred eighty".