38678440 has 16 divisors (see below), whose sum is σ = 87026580. Its totient is φ = 15471360.

The previous prime is 38678429. The next prime is 38678441. The reversal of 38678440 is 4487683.

38678440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 36505764 + 2172676 = 6042^2 + 1474^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 966961 = 38678440 / (3 + 8 + 6 + 7 + 8 + 4 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 38678393 and 38678402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38678441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483441 + ... + 483520.

Almost surely, 2^38678440 is an apocalyptic number.

It is an amenable number.

38678440 is an abundant number, since it is smaller than the sum of its proper divisors (48348140).

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

38678440 is a wasteful number, since it uses less digits than its factorization.

38678440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966972 (or 966968 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 38678440 is about 6219.1993053769. The cubic root of 38678440 is about 338.1865384900.

The spelling of 38678440 in words is "thirty-eight million, six hundred seventy-eight thousand, four hundred forty".