2378515840 has 128 divisors (see below), whose sum is σ = 5869324800. Its totient is φ = 921212928.

The previous prime is 2378515829. The next prime is 2378515901. The reversal of 2378515840 is 485158732.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×2378515840² = 11314675202261811200, which contains 22 as substring.

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, 3218191 + ... + 3218929.

It is an arithmetic number, because the mean of its divisors is an integer number (45854100).

Almost surely, 2^2378515840 is an apocalyptic number.

2378515840 is a gapful number since it is divisible by the number (20) 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 2378515840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2934662400).

2378515840 is an abundant number, since it is smaller than the sum of its proper divisors (3490808960).

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

2378515840 is a wasteful number, since it uses less digits than its factorization.

2378515840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 2378515840 is about 48770.0301414711. The cubic root of 2378515840 is about 1334.8588627931.

The spelling of 2378515840 in words is "two billion, three hundred seventy-eight million, five hundred fifteen thousand, eight hundred forty".