1428978813 has 8 divisors (see below), whose sum is σ = 1956799968. Its totient is φ = 926905104.

The previous prime is 1428978751. The next prime is 1428978827. The reversal of 1428978813 is 3188798241.

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

It is not a de Polignac number, because 1428978813 - 2⁸ = 1428978557 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428978013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6436731 + ... + 6436952.

It is an arithmetic number, because the mean of its divisors is an integer number (244599996).

Almost surely, 2^1428978813 is an apocalyptic number.

It is an amenable number.

1428978813 is a deficient number, since it is larger than the sum of its proper divisors (527821155).

1428978813 is a wasteful number, since it uses less digits than its factorization.

1428978813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12873723.

The product of its digits is 774144, while the sum is 51.

The square root of 1428978813 is about 37801.8361061999. The cubic root of 1428978813 is about 1126.3549273002.

The spelling of 1428978813 in words is "one billion, four hundred twenty-eight million, nine hundred seventy-eight thousand, eight hundred thirteen".