39428680 has 32 divisors (see below), whose sum is σ = 91115640. Its totient is φ = 15344640.

The previous prime is 39428677. The next prime is 39428681. The reversal of 39428680 is 8682493.

It can be written as a sum of positive squares in 4 ways, for example, as 30272004 + 9156676 = 5502^2 + 3026^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (39428681) 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, 11841 + ... + 14800.

Almost surely, 2^39428680 is an apocalyptic number.

It is an amenable number.

39428680 is an abundant number, since it is smaller than the sum of its proper divisors (51686960).

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

39428680 is a wasteful number, since it uses less digits than its factorization.

39428680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26689 (or 26685 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 39428680 is about 6279.2260669608. The cubic root of 39428680 is about 340.3591360882.

The spelling of 39428680 in words is "thirty-nine million, four hundred twenty-eight thousand, six hundred eighty".