1540428 has 24 divisors (see below), whose sum is σ = 3624432. Its totient is φ = 509184.

The previous prime is 1540423. The next prime is 1540447. The reversal of 1540428 is 8240451.

It is a junction number, because it is equal to n+sod(n) for n = 1540398 and 1540407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1176 + ... + 2112.

It is an arithmetic number, because the mean of its divisors is an integer number (151018).

2^1540428 is an apocalyptic number.

It is an amenable number.

1540428 is an abundant number, since it is smaller than the sum of its proper divisors (2084004).

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

1540428 is a wasteful number, since it uses less digits than its factorization.

1540428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081 (or 1079 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 1540428 is about 1241.1397987334. The cubic root of 1540428 is about 115.4907321887.

Adding to 1540428 its reverse (8240451), we get a palindrome (9780879).

The spelling of 1540428 in words is "one million, five hundred forty thousand, four hundred twenty-eight".