2780304 has 20 divisors (see below), whose sum is σ = 7182576.
Its totient is φ = 926752.
The previous prime is 2780303. The next prime is 2780329. The reversal of 2780304 is 4030872.
It is a Harshad number since it is a multiple of its sum of digits (24).
It is not an unprimeable number, because it can be changed into a prime (2780303) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28914 + ... + 29009.
22780304 is an apocalyptic number.
2780304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.
It is an amenable number.
2780304 is an abundant number, since it is smaller than the sum of its proper divisors (4402272).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2780304 is a wasteful number, since it uses less digits than its factorization.
2780304 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 57934 (or 57928 counting only the distinct ones).
The product of its (nonzero) digits is 1344, while the sum is 24.
The square root of 2780304 is about 1667.4243611031.
The cubic root of 2780304 is about 140.6147119387.
The spelling of 2780304 in words is "two million, seven hundred eighty thousand, three hundred four".