1428771770 has 8 divisors (see below), whose sum is σ = 2571789204. Its totient is φ = 571508704.

The previous prime is 1428771763. The next prime is 1428771779. The reversal of 1428771770 is 771778241.

It can be written as a sum of positive squares in 2 ways, for example, as 1388233081 + 40538689 = 37259^2 + 6367^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1428771779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71438579 + ... + 71438598.

Almost surely, 2^1428771770 is an apocalyptic number.

1428771770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1428771770 is a deficient number, since it is larger than the sum of its proper divisors (1143017434).

1428771770 is a wasteful number, since it uses less digits than its factorization.

1428771770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142877184.

The product of its (nonzero) digits is 153664, while the sum is 44.

The square root of 1428771770 is about 37799.0974759980. The cubic root of 1428771770 is about 1126.3005259415.

The spelling of 1428771770 in words is "one billion, four hundred twenty-eight million, seven hundred seventy-one thousand, seven hundred seventy".