1976220385 has 8 divisors (see below), whose sum is σ = 2385665856. Its totient is φ = 1571508720.

The previous prime is 1976220383. The next prime is 1976220391. The reversal of 1976220385 is 5830226791.

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

It is not a de Polignac number, because 1976220385 - 2¹ = 1976220383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1976220383) 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, 1182531 + ... + 1184200.

It is an arithmetic number, because the mean of its divisors is an integer number (298208232).

Almost surely, 2^1976220385 is an apocalyptic number.

It is an amenable number.

1976220385 is a deficient number, since it is larger than the sum of its proper divisors (409445471).

1976220385 is a wasteful number, since it uses less digits than its factorization.

1976220385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366903.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1976220385 is about 44454.7003701521. The cubic root of 1976220385 is about 1254.9077216638.

The spelling of 1976220385 in words is "one billion, nine hundred seventy-six million, two hundred twenty thousand, three hundred eighty-five".