389687220 has 96 divisors (see below), whose sum is σ = 1305642240. Its totient is φ = 95921280.

The previous prime is 389687203. The next prime is 389687227. The reversal of 389687220 is 22786983.

It is a super-2 number, since 2×389687220² = 303712258862656800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389687227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20736 + ... + 34775.

It is an arithmetic number, because the mean of its divisors is an integer number (13600440).

Almost surely, 2^389687220 is an apocalyptic number.

389687220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

389687220 is an abundant number, since it is smaller than the sum of its proper divisors (915955020).

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

389687220 is a wasteful number, since it uses less digits than its factorization.

389687220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55542 (or 55534 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 389687220 is about 19740.4969542309. The cubic root of 389687220 is about 730.4189875966.

The spelling of 389687220 in words is "three hundred eighty-nine million, six hundred eighty-seven thousand, two hundred twenty".