3728402220 has 24 divisors (see below), whose sum is σ = 10439526384. Its totient is φ = 994240576.

The previous prime is 3728402213. The next prime is 3728402221. The reversal of 3728402220 is 222048273.

It is a super-2 number, since 2×3728402220² = 27801966228201856800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (3728402221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31069959 + ... + 31070078.

It is an arithmetic number, because the mean of its divisors is an integer number (434980266).

Almost surely, 2^3728402220 is an apocalyptic number.

3728402220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3728402220 is an abundant number, since it is smaller than the sum of its proper divisors (6711124164).

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

3728402220 is a wasteful number, since it uses less digits than its factorization.

3728402220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62140049 (or 62140047 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 3728402220 is about 61060.6437895966. The cubic root of 3728402220 is about 1550.6278718855.

The spelling of 3728402220 in words is "three billion, seven hundred twenty-eight million, four hundred two thousand, two hundred twenty".