1019978056 has 32 divisors (see below), whose sum is σ = 1999085760. Its totient is φ = 486965952.

The previous prime is 1019978041. The next prime is 1019978077. The reversal of 1019978056 is 6508799101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 1019977997 and 1019978015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108271 + ... + 117313.

It is an arithmetic number, because the mean of its divisors is an integer number (62471430).

Almost surely, 2^1019978056 is an apocalyptic number.

It is an amenable number.

1019978056 is a deficient number, since it is larger than the sum of its proper divisors (979107704).

1019978056 is a wasteful number, since it uses less digits than its factorization.

1019978056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9685 (or 9681 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 1019978056 is about 31937.0952968488. The cubic root of 1019978056 is about 1006.6154907735.

The spelling of 1019978056 in words is "one billion, nineteen million, nine hundred seventy-eight thousand, fifty-six".