1022429978 has 4 divisors (see below), whose sum is σ = 1533644970. Its totient is φ = 511214988.

The previous prime is 1022429977. The next prime is 1022429981. The reversal of 1022429978 is 8799242201.

1022429978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8799242201 = 773 ⋅11383237.

It can be written as a sum of positive squares in only one way, i.e., 1009777729 + 12652249 = 31777^2 + 3557^2 .

It is not an unprimeable number, because it can be changed into a prime (1022429977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255607493 + ... + 255607496.

Almost surely, 2^1022429978 is an apocalyptic number.

1022429978 is a deficient number, since it is larger than the sum of its proper divisors (511214992).

1022429978 is an equidigital number, since it uses as much as digits as its factorization.

1022429978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511214991.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1022429978 is about 31975.4589959237. The cubic root of 1022429978 is about 1007.4214452316.

The spelling of 1022429978 in words is "one billion, twenty-two million, four hundred twenty-nine thousand, nine hundred seventy-eight".