3721290 has 32 divisors (see below), whose sum is σ = 8997696. Its totient is φ = 984960.

The previous prime is 3721279. The next prime is 3721297. The reversal of 3721290 is 921273.

It is a self number, because there is not a number n which added to its sum of digits gives 3721290.

It is not an unprimeable number, because it can be changed into a prime (3721297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4510 + ... + 5270.

It is an arithmetic number, because the mean of its divisors is an integer number (281178).

Almost surely, 2^3721290 is an apocalyptic number.

3721290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3721290 is an abundant number, since it is smaller than the sum of its proper divisors (5276406).

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

3721290 is a wasteful number, since it uses less digits than its factorization.

3721290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 3721290 is about 1929.0645401334. The cubic root of 3721290 is about 154.9641262799.

The spelling of 3721290 in words is "three million, seven hundred twenty-one thousand, two hundred ninety".