2781478090 has 16 divisors (see below), whose sum is σ = 5224341888. Its totient is φ = 1064217616.

The previous prime is 2781478081. The next prime is 2781478093. The reversal of 2781478090 is 908741872.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 2781478090.

It is not an unprimeable number, because it can be changed into a prime (2781478093) 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, 6046462 + ... + 6046921.

It is an arithmetic number, because the mean of its divisors is an integer number (326521368).

Almost surely, 2^2781478090 is an apocalyptic number.

2781478090 is a deficient number, since it is larger than the sum of its proper divisors (2442863798).

2781478090 is a wasteful number, since it uses less digits than its factorization.

2781478090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12093413.

The product of its (nonzero) digits is 225792, while the sum is 46.

The square root of 2781478090 is about 52739.7202305814. The cubic root of 2781478090 is about 1406.3450247162.

The spelling of 2781478090 in words is "two billion, seven hundred eighty-one million, four hundred seventy-eight thousand, ninety".