1940978057 has 8 divisors (see below), whose sum is σ = 1954335552. Its totient is φ = 1927666800.

The previous prime is 1940978029. The next prime is 1940978071. The reversal of 1940978057 is 7508790491.

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 1940978057 - 2⁶ = 1940977993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1940977996 and 1940978014.

It is not an unprimeable number, because it can be changed into a prime (1940978657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74882 + ... + 97412.

It is an arithmetic number, because the mean of its divisors is an integer number (244291944).

Almost surely, 2^1940978057 is an apocalyptic number.

It is an amenable number.

1940978057 is a deficient number, since it is larger than the sum of its proper divisors (13357495).

1940978057 is a wasteful number, since it uses less digits than its factorization.

1940978057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23119.

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 1940978057 is about 44056.5325122166. The cubic root of 1940978057 is about 1247.4032614546.

The spelling of 1940978057 in words is "one billion, nine hundred forty million, nine hundred seventy-eight thousand, fifty-seven".