307820820 has 48 divisors (see below), whose sum is σ = 878169600. Its totient is φ = 80535936.

The previous prime is 307820801. The next prime is 307820837. The reversal of 307820820 is 28028703.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45220 + ... + 51579.

It is an arithmetic number, because the mean of its divisors is an integer number (18295200).

Almost surely, 2^307820820 is an apocalyptic number.

307820820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

307820820 is an abundant number, since it is smaller than the sum of its proper divisors (570348780).

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

307820820 is a wasteful number, since it uses less digits than its factorization.

307820820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96864 (or 96862 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 307820820 is about 17544.8231681029. The cubic root of 307820820 is about 675.2003575324.

The spelling of 307820820 in words is "three hundred seven million, eight hundred twenty thousand, eight hundred twenty".