15428839 has 2 divisors, whose sum is σ = 15428840. Its totient is φ = 15428838.

The previous prime is 15428813. The next prime is 15428857. The reversal of 15428839 is 93882451.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15428839 is a prime.

It is a super-4 number, since 4×15428839⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15428339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7714419 + 7714420.

It is an arithmetic number, because the mean of its divisors is an integer number (7714420).

Almost surely, 2^15428839 is an apocalyptic number.

15428839 is a deficient number, since it is larger than the sum of its proper divisors (1).

15428839 is an equidigital number, since it uses as much as digits as its factorization.

15428839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The square root of 15428839 is about 3927.9560842759. The cubic root of 15428839 is about 248.9493991359.

The spelling of 15428839 in words is "fifteen million, four hundred twenty-eight thousand, eight hundred thirty-nine".