308428613820 has 36 divisors (see below), whose sum is σ = 935566795800. Its totient is φ = 82247630304.

The previous prime is 308428613819. The next prime is 308428613833. The reversal of 308428613820 is 28316824803.

308428613820 is a `hidden beast` number, since 3 + 0 + 8 + 4 + 2 + 8 + 613 + 8 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 856745970 + ... + 856746329.

It is an arithmetic number, because the mean of its divisors is an integer number (25987966550).

Almost surely, 2^308428613820 is an apocalyptic number.

308428613820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

308428613820 is an abundant number, since it is smaller than the sum of its proper divisors (627138181980).

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

308428613820 is a wasteful number, since it uses less digits than its factorization.

308428613820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713492314 (or 1713492309 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 308428613820 in words is "three hundred eight billion, four hundred twenty-eight million, six hundred thirteen thousand, eight hundred twenty".