387420920 has 32 divisors (see below), whose sum is σ = 873357120. Its totient is φ = 154673280.

The previous prime is 387420883. The next prime is 387420923. The reversal of 387420920 is 29024783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387420923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12689 + ... + 30591.

It is an arithmetic number, because the mean of its divisors is an integer number (27292410).

Almost surely, 2^387420920 is an apocalyptic number.

It is an amenable number.

387420920 is an abundant number, since it is smaller than the sum of its proper divisors (485936200).

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

387420920 is a wasteful number, since it uses less digits than its factorization.

387420920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18455 (or 18451 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 387420920 is about 19683.0109485312. The cubic root of 387420920 is about 729.0002703341. Note that the first 3 decimals are identical.

The spelling of 387420920 in words is "three hundred eighty-seven million, four hundred twenty thousand, nine hundred twenty".