387308820 has 48 divisors (see below), whose sum is σ = 1086539328. Its totient is φ = 103084800.

The previous prime is 387308777. The next prime is 387308849. The reversal of 387308820 is 28803783.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26920 + ... + 38720.

It is an arithmetic number, because the mean of its divisors is an integer number (22636236).

Almost surely, 2^387308820 is an apocalyptic number.

387308820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

387308820 is an abundant number, since it is smaller than the sum of its proper divisors (699230508).

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

387308820 is a wasteful number, since it uses less digits than its factorization.

387308820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12360 (or 12358 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 387308820 is about 19680.1631090802. The cubic root of 387308820 is about 728.9299516279.

The spelling of 387308820 in words is "three hundred eighty-seven million, three hundred eight thousand, eight hundred twenty".