38978402 has 8 divisors (see below), whose sum is σ = 58547712. Its totient is φ = 19462500.

The previous prime is 38978341. The next prime is 38978411. The reversal of 38978402 is 20487983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 38978402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11474 + ... + 14477.

It is an arithmetic number, because the mean of its divisors is an integer number (7318464).

Almost surely, 2^38978402 is an apocalyptic number.

38978402 is a deficient number, since it is larger than the sum of its proper divisors (19569310).

38978402 is a wasteful number, since it uses less digits than its factorization.

38978402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26704.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 38978402 is about 6243.2685349903. The cubic root of 38978402 is about 339.0585315582.

The spelling of 38978402 in words is "thirty-eight million, nine hundred seventy-eight thousand, four hundred two".