7821048 has 16 divisors (see below), whose sum is σ = 19552680. Its totient is φ = 2607008.

The previous prime is 7821043. The next prime is 7821059. The reversal of 7821048 is 8401287.

It is a super-2 number, since 2×7821048² = 122337583636608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7821043) 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, 162915 + ... + 162962.

Almost surely, 2^7821048 is an apocalyptic number.

It is an amenable number.

7821048 is an abundant number, since it is smaller than the sum of its proper divisors (11731632).

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

7821048 is a wasteful number, since it uses less digits than its factorization.

7821048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325886 (or 325882 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 7821048 is about 2796.6136665618. The cubic root of 7821048 is about 198.4974736739.

It can be divided in two parts, 782 and 1048, that added together give a triangular number (1830 = T₆₀).

The spelling of 7821048 in words is "seven million, eight hundred twenty-one thousand, forty-eight".