2015428 has 6 divisors (see below), whose sum is σ = 3527006. Its totient is φ = 1007712.

The previous prime is 2015423. The next prime is 2015441. The reversal of 2015428 is 8245102.

It can be written as a sum of positive squares in only one way, i.e., 1272384 + 743044 = 1128^2 + 862^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2015399 and 2015408.

It is not an unprimeable number, because it can be changed into a prime (2015423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251925 + ... + 251932.

2^2015428 is an apocalyptic number.

It is an amenable number.

2015428 is a deficient number, since it is larger than the sum of its proper divisors (1511578).

2015428 is a wasteful number, since it uses less digits than its factorization.

2015428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503861 (or 503859 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2015428 is about 1419.6577052233. The cubic root of 2015428 is about 126.3152432116.

The spelling of 2015428 in words is "two million, fifteen thousand, four hundred twenty-eight".