28439410 has 8 divisors (see below), whose sum is σ = 51190956. Its totient is φ = 11375760.

The previous prime is 28439399. The next prime is 28439417. The reversal of 28439410 is 1493482.

It can be written as a sum of positive squares in 2 ways, for example, as 28270489 + 168921 = 5317^2 + 411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28439410² = 1617600082296200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28439417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1421961 + ... + 1421980.

Almost surely, 2^28439410 is an apocalyptic number.

28439410 is a deficient number, since it is larger than the sum of its proper divisors (22751546).

28439410 is a wasteful number, since it uses less digits than its factorization.

28439410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843948.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28439410 is about 5332.8613332807. The cubic root of 28439410 is about 305.2391209091.

The spelling of 28439410 in words is "twenty-eight million, four hundred thirty-nine thousand, four hundred ten".