1428744077 has 4 divisors (see below), whose sum is σ = 1430812416. Its totient is φ = 1426675740.

The previous prime is 1428744047. The next prime is 1428744091. The reversal of 1428744077 is 7704478241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1428744077 - 2⁸ = 1428743821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428744017) 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, 1033133 + ... + 1034514.

It is an arithmetic number, because the mean of its divisors is an integer number (357703104).

Almost surely, 2^1428744077 is an apocalyptic number.

It is an amenable number.

1428744077 is a deficient number, since it is larger than the sum of its proper divisors (2068339).

1428744077 is an equidigital number, since it uses as much as digits as its factorization.

1428744077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068338.

The product of its (nonzero) digits is 351232, while the sum is 44.

The square root of 1428744077 is about 37798.7311559528. The cubic root of 1428744077 is about 1126.2932490989.

The spelling of 1428744077 in words is "one billion, four hundred twenty-eight million, seven hundred forty-four thousand, seventy-seven".