1538928 has 30 divisors (see below), whose sum is σ = 4307264. Its totient is φ = 512928.

The previous prime is 1538917. The next prime is 1538939. The reversal of 1538928 is 8298351.

It is an interprime number because it is at equal distance from previous prime (1538917) and next prime (1538939).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1538892 and 1538901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5200 + ... + 5487.

2^1538928 is an apocalyptic number.

1538928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1538928 is an abundant number, since it is smaller than the sum of its proper divisors (2768336).

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

1538928 is a wasteful number, since it uses less digits than its factorization.

1538928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10701 (or 10692 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 1538928 is about 1240.5353682987. The cubic root of 1538928 is about 115.4532334419.

The spelling of 1538928 in words is "one million, five hundred thirty-eight thousand, nine hundred twenty-eight".