1978650383 has 8 divisors (see below), whose sum is σ = 2097115920. Its totient is φ = 1860415360.

The previous prime is 1978650379. The next prime is 1978650439. The reversal of 1978650383 is 3830568791.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1978650383 - 2² = 1978650379 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978650083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39788 + ... + 74433.

It is an arithmetic number, because the mean of its divisors is an integer number (262139490).

Almost surely, 2^1978650383 is an apocalyptic number.

1978650383 is a deficient number, since it is larger than the sum of its proper divisors (118465537).

1978650383 is a wasteful number, since it uses less digits than its factorization.

1978650383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115257.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 1978650383 is about 44482.0231441871. The cubic root of 1978650383 is about 1255.4218637528.

The spelling of 1978650383 in words is "one billion, nine hundred seventy-eight million, six hundred fifty thousand, three hundred eighty-three".