383962778 has 4 divisors (see below), whose sum is σ = 575944170. Its totient is φ = 191981388.

The previous prime is 383962771. The next prime is 383962823. The reversal of 383962778 is 877269383.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 877269383 = 12377 ⋅70879.

It can be written as a sum of positive squares in only one way, i.e., 332223529 + 51739249 = 18227^2 + 7193^2 .

It is not an unprimeable number, because it can be changed into a prime (383962771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95990693 + ... + 95990696.

Almost surely, 2^383962778 is an apocalyptic number.

383962778 is a deficient number, since it is larger than the sum of its proper divisors (191981392).

383962778 is a wasteful number, since it uses less digits than its factorization.

383962778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191981391.

The product of its digits is 3048192, while the sum is 53.

The square root of 383962778 is about 19594.9681806325. The cubic root of 383962778 is about 726.8247513522.

The spelling of 383962778 in words is "three hundred eighty-three million, nine hundred sixty-two thousand, seven hundred seventy-eight".