1142789978 has 8 divisors (see below), whose sum is σ = 1870020000. Its totient is φ = 519449980.

The previous prime is 1142789953. The next prime is 1142790013. The reversal of 1142789978 is 8799872411.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25972478 + ... + 25972521.

It is an arithmetic number, because the mean of its divisors is an integer number (233752500).

Almost surely, 2^1142789978 is an apocalyptic number.

1142789978 is a deficient number, since it is larger than the sum of its proper divisors (727230022).

1142789978 is a wasteful number, since it uses less digits than its factorization.

1142789978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51945012.

The product of its digits is 2032128, while the sum is 56.

The square root of 1142789978 is about 33805.1767929115. The cubic root of 1142789978 is about 1045.4954353527.

The spelling of 1142789978 in words is "one billion, one hundred forty-two million, seven hundred eighty-nine thousand, nine hundred seventy-eight".