428038739 has 2 divisors, whose sum is σ = 428038740. Its totient is φ = 428038738.

The previous prime is 428038697. The next prime is 428038747. The reversal of 428038739 is 937830824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428038739 - 2²⁴ = 411261523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428038739.

It is not a weakly prime, because it can be changed into another prime (428038799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214019369 + 214019370.

It is an arithmetic number, because the mean of its divisors is an integer number (214019370).

Almost surely, 2^428038739 is an apocalyptic number.

428038739 is a deficient number, since it is larger than the sum of its proper divisors (1).

428038739 is an equidigital number, since it uses as much as digits as its factorization.

428038739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 428038739 is about 20689.0971045138. The cubic root of 428038739 is about 753.6349405561.

The spelling of 428038739 in words is "four hundred twenty-eight million, thirty-eight thousand, seven hundred thirty-nine".