1540728 has 64 divisors (see below), whose sum is σ = 4896000. Its totient is φ = 439776.

The previous prime is 1540711. The next prime is 1540751. The reversal of 1540728 is 8270451.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1003 + ... + 2021.

It is an arithmetic number, because the mean of its divisors is an integer number (76500).

2^1540728 is an apocalyptic number.

1540728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1540728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2448000).

1540728 is an abundant number, since it is smaller than the sum of its proper divisors (3355272).

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

1540728 is a wasteful number, since it uses less digits than its factorization.

1540728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1540728 is about 1241.2606495011. The cubic root of 1540728 is about 115.4982290165.

The spelling of 1540728 in words is "one million, five hundred forty thousand, seven hundred twenty-eight".