1428571090 has 16 divisors (see below), whose sum is σ = 2573043480. Its totient is φ = 571069440.

The previous prime is 1428571087. The next prime is 1428571093. The reversal of 1428571090 is 901758241.

It is an interprime number because it is at equal distance from previous prime (1428571087) and next prime (1428571093).

It can be written as a sum of positive squares in 4 ways, for example, as 1139265009 + 289306081 = 33753^2 + 17009^2 .

It is not an unprimeable number, because it can be changed into a prime (1428571093) 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, 27855 + ... + 60274.

Almost surely, 2^1428571090 is an apocalyptic number.

1428571090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1428571090 is a deficient number, since it is larger than the sum of its proper divisors (1144472390).

1428571090 is a wasteful number, since it uses less digits than its factorization.

1428571090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89757.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1428571090 is about 37796.4428220435. The cubic root of 1428571090 is about 1126.2477914700.

The spelling of 1428571090 in words is "one billion, four hundred twenty-eight million, five hundred seventy-one thousand, ninety".