2807398440 has 768 divisors, whose sum is σ = 12277923840. Its totient is φ = 564537600.

The previous prime is 2807398417. The next prime is 2807398457. The reversal of 2807398440 is 448937082.

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 191 ways as a sum of consecutive naturals, for example, 90561225 + ... + 90561255.

It is an arithmetic number, because the mean of its divisors is an integer number (15986880).

Almost surely, 2^2807398440 is an apocalyptic number.

2807398440 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 2807398440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6138961920).

2807398440 is an abundant number, since it is smaller than the sum of its proper divisors (9470525400).

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

2807398440 is a wasteful number, since it uses less digits than its factorization.

2807398440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 2807398440 is about 52984.8887891633. Note that the first 3 decimals coincide. The cubic root of 2807398440 is about 1410.7000597896.

The spelling of 2807398440 in words is "two billion, eight hundred seven million, three hundred ninety-eight thousand, four hundred forty".