1423669778 has 8 divisors (see below), whose sum is σ = 2228352768. Its totient is φ = 680885524.

The previous prime is 1423669763. The next prime is 1423669781. The reversal of 1423669778 is 8779663241.

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, 15474626 + ... + 15474717.

It is an arithmetic number, because the mean of its divisors is an integer number (278544096).

Almost surely, 2^1423669778 is an apocalyptic number.

1423669778 is a deficient number, since it is larger than the sum of its proper divisors (804682990).

1423669778 is a wasteful number, since it uses less digits than its factorization.

1423669778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30949368.

The product of its digits is 3048192, while the sum is 53.

The square root of 1423669778 is about 37731.5488417849. The cubic root of 1423669778 is about 1124.9582938942.

The spelling of 1423669778 in words is "one billion, four hundred twenty-three million, six hundred sixty-nine thousand, seven hundred seventy-eight".