1428620546 has 4 divisors (see below), whose sum is σ = 2142930822. Its totient is φ = 714310272.

The previous prime is 1428620539. The next prime is 1428620561. The reversal of 1428620546 is 6450268241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6450268241 = 2909 ⋅2217349.

It can be written as a sum of positive squares in only one way, i.e., 759829225 + 668791321 = 27565^2 + 25861^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357155135 + ... + 357155138.

Almost surely, 2^1428620546 is an apocalyptic number.

1428620546 is a deficient number, since it is larger than the sum of its proper divisors (714310276).

1428620546 is an equidigital number, since it uses as much as digits as its factorization.

1428620546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714310275.

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 1428620546 is about 37797.0970578429. The cubic root of 1428620546 is about 1126.2607879223.

Adding to 1428620546 its reverse (6450268241), we get a palindrome (7878888787).

The spelling of 1428620546 in words is "one billion, four hundred twenty-eight million, six hundred twenty thousand, five hundred forty-six".