280052639 has 8 divisors (see below), whose sum is σ = 282197520. Its totient is φ = 277915456.

The previous prime is 280052629. The next prime is 280052659. The reversal of 280052639 is 936250082.

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

It is a cyclic number.

It is not a de Polignac number, because 280052639 - 2²⁸ = 11617183 is a prime.

It is a super-2 number, since 2×280052639² = 156858961221728642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 280052599 and 280052608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280052629) 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, 85667 + ... + 88875.

It is an arithmetic number, because the mean of its divisors is an integer number (35274690).

Almost surely, 2^280052639 is an apocalyptic number.

280052639 is a deficient number, since it is larger than the sum of its proper divisors (2144881).

280052639 is a wasteful number, since it uses less digits than its factorization.

280052639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 280052639 is about 16734.7733477332. The cubic root of 280052639 is about 654.2542560545.

The spelling of 280052639 in words is "two hundred eighty million, fifty-two thousand, six hundred thirty-nine".