39778942 has 8 divisors (see below), whose sum is σ = 68192496. Its totient is φ = 17048112.

The previous prime is 39778927. The next prime is 39778969. The reversal of 39778942 is 24987793.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1420663 + ... + 1420690.

It is an arithmetic number, because the mean of its divisors is an integer number (8524062).

Almost surely, 2^39778942 is an apocalyptic number.

39778942 is a deficient number, since it is larger than the sum of its proper divisors (28413554).

39778942 is a wasteful number, since it uses less digits than its factorization.

39778942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2841362.

The product of its digits is 762048, while the sum is 49.

The square root of 39778942 is about 6307.0549387174. The cubic root of 39778942 is about 341.3640187545.

The spelling of 39778942 in words is "thirty-nine million, seven hundred seventy-eight thousand, nine hundred forty-two".