10420389 has 18 divisors (see below), whose sum is σ = 17509830. Its totient is φ = 5954256.

The previous prime is 10420381. The next prime is 10420393. The reversal of 10420389 is 98302401.

It can be written as a sum of positive squares in only one way, i.e., 5832225 + 4588164 = 2415^2 + 2142^2 .

It is not a de Polignac number, because 10420389 - 2³ = 10420381 is a prime.

It is a super-2 number, since 2×10420389² = 217169013822642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10420381) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11374 + ... + 12255.

Almost surely, 2^10420389 is an apocalyptic number.

It is an amenable number.

10420389 is a deficient number, since it is larger than the sum of its proper divisors (7089441).

10420389 is a wasteful number, since it uses less digits than its factorization.

10420389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23649 (or 23639 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 10420389 is about 3228.0627317325. The cubic root of 10420389 is about 218.4211271475.

The spelling of 10420389 in words is "ten million, four hundred twenty thousand, three hundred eighty-nine".