1939428 has 36 divisors (see below), whose sum is σ = 5192460. Its totient is φ = 608256.

The previous prime is 1939409. The next prime is 1939439. The reversal of 1939428 is 8249391.

It can be written as a sum of positive squares in 2 ways, for example, as 1557504 + 381924 = 1248^2 + 618^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1939428² = 7522761934368, which contains 22 as substring.

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 = 1939392 and 1939401.

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 11 ways as a sum of consecutive naturals, for example, 973 + ... + 2196.

It is an arithmetic number, because the mean of its divisors is an integer number (144235).

2^1939428 is an apocalyptic number.

1939428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1939428 is an abundant number, since it is smaller than the sum of its proper divisors (3253032).

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

1939428 is a wasteful number, since it uses less digits than its factorization.

1939428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196 (or 3191 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 1939428 is about 1392.6334765472. The cubic root of 1939428 is about 124.7071116004.

The spelling of 1939428 in words is "one million, nine hundred thirty-nine thousand, four hundred twenty-eight".