728427519 has 8 divisors (see below), whose sum is σ = 1079151920. Its totient is φ = 485618328.

The previous prime is 728427499. The next prime is 728427559. The reversal of 728427519 is 915724827.

It is a happy number.

It is not a de Polignac number, because 728427519 - 2⁷ = 728427391 is a prime.

It is a super-2 number, since 2×728427519² = 1061213300872990722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728427559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13489372 + ... + 13489425.

It is an arithmetic number, because the mean of its divisors is an integer number (134893990).

Almost surely, 2^728427519 is an apocalyptic number.

728427519 is a deficient number, since it is larger than the sum of its proper divisors (350724401).

728427519 is a wasteful number, since it uses less digits than its factorization.

728427519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26978806 (or 26978800 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 728427519 is about 26989.3964178527. The cubic root of 728427519 is about 899.7643494152.

The spelling of 728427519 in words is "seven hundred twenty-eight million, four hundred twenty-seven thousand, five hundred nineteen".