38430989 has 4 divisors (see below), whose sum is σ = 39156156. Its totient is φ = 37705824.

The previous prime is 38430983. The next prime is 38431013. The reversal of 38430989 is 98903483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13380964 + 25050025 = 3658^2 + 5005^2 .

It is a cyclic number.

It is not a de Polignac number, because 38430989 - 2²⁰ = 37382413 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 (38430983) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 362504 + ... + 362609.

It is an arithmetic number, because the mean of its divisors is an integer number (9789039).

Almost surely, 2^38430989 is an apocalyptic number.

It is an amenable number.

38430989 is a deficient number, since it is larger than the sum of its proper divisors (725167).

38430989 is an equidigital number, since it uses as much as digits as its factorization.

38430989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725166.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 38430989 is about 6199.2732638592. The cubic root of 38430989 is about 337.4637956592.

The spelling of 38430989 in words is "thirty-eight million, four hundred thirty thousand, nine hundred eighty-nine".