2780001540 has 48 divisors (see below), whose sum is σ = 8648895360. Its totient is φ = 741333600.

The previous prime is 2780001533. The next prime is 2780001563. The reversal of 2780001540 is 451000872.

It is a super-3 number, since 3×2780001540³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 2573536 + ... + 2574615.

It is an arithmetic number, because the mean of its divisors is an integer number (180185320).

Almost surely, 2^2780001540 is an apocalyptic number.

2780001540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2780001540 is an abundant number, since it is smaller than the sum of its proper divisors (5868893820).

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

2780001540 is a wasteful number, since it uses less digits than its factorization.

2780001540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5148169 (or 5148161 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2780001540 is about 52725.7199097367. The cubic root of 2780001540 is about 1406.0961275194.

The spelling of 2780001540 in words is "two billion, seven hundred eighty million, one thousand, five hundred forty".