2763978 has 16 divisors (see below), whose sum is σ = 6317760. Its totient is φ = 789696.

The previous prime is 2763977. The next prime is 2763989. The reversal of 2763978 is 8793672.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 65809 = 2763978 / (2 + 7 + 6 + 3 + 9 + 7 + 8).

It is a d-powerful number, because it can be written as 2¹⁹ + 7³ + 6⁶ + 3⁹ + 9⁵ + 7⁵ + 8⁷ .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2763977) 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, 32863 + ... + 32946.

It is an arithmetic number, because the mean of its divisors is an integer number (394860).

2^2763978 is an apocalyptic number.

2763978 is an abundant number, since it is smaller than the sum of its proper divisors (3553782).

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

2763978 is a wasteful number, since it uses less digits than its factorization.

2763978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65821.

The product of its digits is 127008, while the sum is 42.

The square root of 2763978 is about 1662.5215788073. The cubic root of 2763978 is about 140.3389406656.

It can be divided in two parts, 2763 and 978, that added together give a triangular number (3741 = T₈₆).

The spelling of 2763978 in words is "two million, seven hundred sixty-three thousand, nine hundred seventy-eight".