872505278 has 8 divisors (see below), whose sum is σ = 1308966672. Its totient is φ = 436183056.

The previous prime is 872505269. The next prime is 872505287.

872505278 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (872505269) and next prime (872505287).

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

It is a super-2 number, since 2×872505278² = 1522530920275714568, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17375 + ... + 45242.

It is an arithmetic number, because the mean of its divisors is an integer number (163620834).

Almost surely, 2^872505278 is an apocalyptic number.

872505278 is a deficient number, since it is larger than the sum of its proper divisors (436461394).

872505278 is a wasteful number, since it uses less digits than its factorization.

872505278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69586.

The product of its (nonzero) digits is 313600, while the sum is 44.

The square root of 872505278 is about 29538.2003175549. The cubic root of 872505278 is about 955.5557296546. Note that the first 3 decimals are identical.

The spelling of 872505278 in words is "eight hundred seventy-two million, five hundred five thousand, two hundred seventy-eight".