1520428 has 24 divisors (see below), whose sum is σ = 3275552. Its totient is φ = 601344.

The previous prime is 1520423. The next prime is 1520443. The reversal of 1520428 is 8240251.

It is a junction number, because it is equal to n+sod(n) for n = 1520399 and 1520408.

It is not an unprimeable number, because it can be changed into a prime (1520423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1725 + ... + 2452.

2^1520428 is an apocalyptic number.

It is an amenable number.

1520428 is an abundant number, since it is smaller than the sum of its proper divisors (1755124).

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

1520428 is a wasteful number, since it uses less digits than its factorization.

1520428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201 (or 4199 counting only the distinct ones).

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

The square root of 1520428 is about 1233.0563652972. The cubic root of 1520428 is about 114.9887323554.

Adding to 1520428 its reverse (8240251), we get a palindrome (9760679).

The spelling of 1520428 in words is "one million, five hundred twenty thousand, four hundred twenty-eight".