652778 has 12 divisors (see below), whose sum is σ = 1139202. Its totient is φ = 279720.

The previous prime is 652759. The next prime is 652787. The reversal of 652778 is 877256.

It can be written as a sum of positive squares in only one way, i.e., 405769 + 247009 = 637^2 + 497^2 .

It is a super-2 number, since 2×652778² = 852238234568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3233 + ... + 3428.

2⁶⁵²⁷⁷⁸ is an apocalyptic number.

652778 is a deficient number, since it is larger than the sum of its proper divisors (486424).

652778 is a wasteful number, since it uses less digits than its factorization.

652778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6677 (or 6670 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 652778 is about 807.9467804255. The cubic root of 652778 is about 86.7471409002.

The spelling of 652778 in words is "six hundred fifty-two thousand, seven hundred seventy-eight".