1859940 has 36 divisors (see below), whose sum is σ = 5642364. Its totient is φ = 495936.

The previous prime is 1859927. The next prime is 1859971. The reversal of 1859940 is 499581.

1859940 = T₂₃₅ + T₂₃₆ + ... + T₂₈₈.

It can be written as a sum of positive squares in 2 ways, for example, as 1028196 + 831744 = 1014^2 + 912^2 .

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

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1859895 and 1859904.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4987 + ... + 5346.

2^1859940 is an apocalyptic number.

1859940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1859940 is an abundant number, since it is smaller than the sum of its proper divisors (3782424).

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

1859940 is a wasteful number, since it uses less digits than its factorization.

1859940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10348 (or 10343 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1859940 is about 1363.7961724539. The cubic root of 1859940 is about 122.9795722570.

The spelling of 1859940 in words is "one million, eight hundred fifty-nine thousand, nine hundred forty".