3822390 has 144 divisors (see below), whose sum is σ = 12199824. Its totient is φ = 855360.

The previous prime is 3822383. The next prime is 3822397. The reversal of 3822390 is 932283.

3822390 = T₁₅₆ + T₁₅₇ + ... + T₂₉₈.

It is an interprime number because it is at equal distance from previous prime (3822383) and next prime (3822397).

It is a super-2 number, since 2×3822390² = 29221330624200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3822397) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 294024 + ... + 294036.

It is an arithmetic number, because the mean of its divisors is an integer number (84721).

Almost surely, 2^3822390 is an apocalyptic number.

3822390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3822390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6099912).

3822390 is an abundant number, since it is smaller than the sum of its proper divisors (8377434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3822390 is a wasteful number, since it uses less digits than its factorization.

3822390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 3822390 is about 1955.0933481550. The cubic root of 3822390 is about 156.3549609434.

It can be divided in two parts, 382 and 2390, that added together give a palindrome (2772).

The spelling of 3822390 in words is "three million, eight hundred twenty-two thousand, three hundred ninety".