1428490639 has 2 divisors, whose sum is σ = 1428490640. Its totient is φ = 1428490638.

The previous prime is 1428490621. The next prime is 1428490681. The reversal of 1428490639 is 9360948241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1428490639 - 2¹¹ = 1428488591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428496639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714245319 + 714245320.

It is an arithmetic number, because the mean of its divisors is an integer number (714245320).

Almost surely, 2^1428490639 is an apocalyptic number.

1428490639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428490639 is an equidigital number, since it uses as much as digits as its factorization.

1428490639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 1428490639 is about 37795.3785402395. The cubic root of 1428490639 is about 1126.2266492572.

The spelling of 1428490639 in words is "one billion, four hundred twenty-eight million, four hundred ninety thousand, six hundred thirty-nine".