39628778 has 8 divisors (see below), whose sum is σ = 67935072. Its totient is φ = 16983756.

The previous prime is 39628777. The next prime is 39628783. The reversal of 39628778 is 87782693.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (39628777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1415300 + ... + 1415327.

It is an arithmetic number, because the mean of its divisors is an integer number (8491884).

Almost surely, 2^39628778 is an apocalyptic number.

39628778 is a deficient number, since it is larger than the sum of its proper divisors (28306294).

39628778 is a wasteful number, since it uses less digits than its factorization.

39628778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830636.

The product of its digits is 1016064, while the sum is 50.

The square root of 39628778 is about 6295.1392359502. The cubic root of 39628778 is about 340.9339316967.

The spelling of 39628778 in words is "thirty-nine million, six hundred twenty-eight thousand, seven hundred seventy-eight".