2797280640 has 1152 divisors, whose sum is σ = 13223826720. Its totient is φ = 536739840.

The previous prime is 2797280621. The next prime is 2797280663. The reversal of 2797280640 is 460827972.

It is a tau number, because it is divible by the number of its divisors (1152).

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 143 ways as a sum of consecutive naturals, for example, 52778854 + ... + 52778906.

Almost surely, 2^2797280640 is an apocalyptic number.

2797280640 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 2797280640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6611913360).

2797280640 is an abundant number, since it is smaller than the sum of its proper divisors (10426546080).

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

2797280640 is a wasteful number, since it uses less digits than its factorization.

2797280640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 2797280640 is about 52889.3244426510. The cubic root of 2797280640 is about 1409.0033095153.

The spelling of 2797280640 in words is "two billion, seven hundred ninety-seven million, two hundred eighty thousand, six hundred forty".