6321428 has 6 divisors (see below), whose sum is σ = 11062506. Its totient is φ = 3160712.

The previous prime is 6321409. The next prime is 6321443. The reversal of 6321428 is 8241236.

6321428 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5071504 + 1249924 = 2252^2 + 1118^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6321397 and 6321406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 790175 + ... + 790182.

It is an arithmetic number, because the mean of its divisors is an integer number (1843751).

Almost surely, 2^6321428 is an apocalyptic number.

It is an amenable number.

6321428 is a deficient number, since it is larger than the sum of its proper divisors (4741078).

6321428 is a wasteful number, since it uses less digits than its factorization.

6321428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580361 (or 1580359 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 6321428 is about 2514.2450159044. The cubic root of 6321428 is about 184.9006332705.

It can be divided in two parts, 632 and 1428, that multiplied together give a triangular number (902496 = T₁₃₄₃).

The spelling of 6321428 in words is "six million, three hundred twenty-one thousand, four hundred twenty-eight".