3728920331 has 2 divisors, whose sum is σ = 3728920332. Its totient is φ = 3728920330.

The previous prime is 3728920277. The next prime is 3728920337. The reversal of 3728920331 is 1330298273.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3728920331 - 2¹⁰ = 3728919307 is a prime.

It is a super-2 number, since 2×3728920331² = 27809693669890299122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3728920337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1864460165 + 1864460166.

It is an arithmetic number, because the mean of its divisors is an integer number (1864460166).

Almost surely, 2^3728920331 is an apocalyptic number.

3728920331 is a deficient number, since it is larger than the sum of its proper divisors (1).

3728920331 is an equidigital number, since it uses as much as digits as its factorization.

3728920331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 3728920331 is about 61064.8862358721. The cubic root of 3728920331 is about 1550.6996953369.

The spelling of 3728920331 in words is "three billion, seven hundred twenty-eight million, nine hundred twenty thousand, three hundred thirty-one".