3640220278 has 8 divisors (see below), whose sum is σ = 5464835568. Its totient is φ = 1818608424.

The previous prime is 3640220267. The next prime is 3640220293. The reversal of 3640220278 is 8720220463.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 747826 + ... + 752677.

It is an arithmetic number, because the mean of its divisors is an integer number (683104446).

Almost surely, 2^3640220278 is an apocalyptic number.

3640220278 is a deficient number, since it is larger than the sum of its proper divisors (1824615290).

3640220278 is a wasteful number, since it uses less digits than its factorization.

3640220278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501718.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 3640220278 is about 60334.2380245247. The cubic root of 3640220278 is about 1538.3053656064.

The spelling of 3640220278 in words is "three billion, six hundred forty million, two hundred twenty thousand, two hundred seventy-eight".