308813053440 has 160 divisors (see below), whose sum is σ = 995976137376. Its totient is φ = 81621155840.

The previous prime is 308813053403. The next prime is 308813053441. The reversal of 308813053440 is 44350318803.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308813053441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 689920 + ... + 1045760.

Almost surely, 2^308813053440 is an apocalyptic number.

308813053440 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 308813053440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497988068688).

308813053440 is an abundant number, since it is smaller than the sum of its proper divisors (687163083936).

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

308813053440 is a wasteful number, since it uses less digits than its factorization.

308813053440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355980 (or 355964 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 308813053440 in words is "three hundred eight billion, eight hundred thirteen million, fifty-three thousand, four hundred forty".