308020285440 has 1664 divisors, whose sum is σ = 1376905789440. Its totient is φ = 63700992000.

The previous prime is 308020285399. The next prime is 308020285451. The reversal of 308020285440 is 44582020803.

308020285440 is a `hidden beast` number, since 3 + 0 + 8 + 0 + 202 + 8 + 5 + 440 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 308020285395 and 308020285404.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2039869365 + ... + 2039869515.

Almost surely, 2^308020285440 is an apocalyptic number.

308020285440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308020285440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (688452894720).

308020285440 is an abundant number, since it is smaller than the sum of its proper divisors (1068885504000).

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

308020285440 is a wasteful number, since it uses less digits than its factorization.

308020285440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The spelling of 308020285440 in words is "three hundred eight billion, twenty million, two hundred eighty-five thousand, four hundred forty".