2788401261 has 8 divisors (see below), whose sum is σ = 3718146240. Its totient is φ = 1858795232.

The previous prime is 2788401241. The next prime is 2788401277. The reversal of 2788401261 is 1621048872.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2788401261 - 2¹⁵ = 2788368493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2788401211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28576 + ... + 79958.

It is an arithmetic number, because the mean of its divisors is an integer number (464768280).

Almost surely, 2^2788401261 is an apocalyptic number.

It is an amenable number.

2788401261 is a deficient number, since it is larger than the sum of its proper divisors (929744979).

2788401261 is a wasteful number, since it uses less digits than its factorization.

2788401261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69475.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 2788401261 is about 52805.3147041091. The cubic root of 2788401261 is about 1407.5108677086.

The spelling of 2788401261 in words is "two billion, seven hundred eighty-eight million, four hundred one thousand, two hundred sixty-one".