387818980 has 12 divisors (see below), whose sum is σ = 814419900. Its totient is φ = 155127584.

The previous prime is 387818971. The next prime is 387818983. The reversal of 387818980 is 89818783.

It can be written as a sum of positive squares in 2 ways, for example, as 48080356 + 339738624 = 6934^2 + 18432^2 .

It is a super-2 number, since 2×387818980² = 300807122496480800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (387818983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9695455 + ... + 9695494.

It is an arithmetic number, because the mean of its divisors is an integer number (67868325).

Almost surely, 2^387818980 is an apocalyptic number.

It is an amenable number.

387818980 is an abundant number, since it is smaller than the sum of its proper divisors (426600920).

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

387818980 is a wasteful number, since it uses less digits than its factorization.

387818980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19390958 (or 19390956 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 52.

The square root of 387818980 is about 19693.1201184576. The cubic root of 387818980 is about 729.2498580602.

The spelling of 387818980 in words is "three hundred eighty-seven million, eight hundred eighteen thousand, nine hundred eighty".