3621278 has 16 divisors (see below), whose sum is σ = 5598720. Its totient is φ = 1755936.

The previous prime is 3621271. The next prime is 3621287. The reversal of 3621278 is 8721263.

It is a happy number.

It is a super-2 number, since 2×3621278² = 26227308706568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3621278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621271) 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, 13328 + ... + 13596.

It is an arithmetic number, because the mean of its divisors is an integer number (349920).

Almost surely, 2^3621278 is an apocalyptic number.

3621278 is a deficient number, since it is larger than the sum of its proper divisors (1977442).

3621278 is a wasteful number, since it uses less digits than its factorization.

3621278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451.

The product of its digits is 4032, while the sum is 29.

The square root of 3621278 is about 1902.9655803508. The cubic root of 3621278 is about 153.5632478168.

The spelling of 3621278 in words is "three million, six hundred twenty-one thousand, two hundred seventy-eight".