39428390 has 8 divisors (see below), whose sum is σ = 70971120. Its totient is φ = 15771352.

The previous prime is 39428369. The next prime is 39428393. The reversal of 39428390 is 9382493.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39428393) by changing a digit.

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, 1971410 + ... + 1971429.

It is an arithmetic number, because the mean of its divisors is an integer number (8871390).

Almost surely, 2^39428390 is an apocalyptic number.

39428390 is a deficient number, since it is larger than the sum of its proper divisors (31542730).

39428390 is a wasteful number, since it uses less digits than its factorization.

39428390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942846.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 39428390 is about 6279.2029749006. The cubic root of 39428390 is about 340.3583016330.

The spelling of 39428390 in words is "thirty-nine million, four hundred twenty-eight thousand, three hundred ninety".