1864140 has 24 divisors (see below), whose sum is σ = 5219760. Its totient is φ = 497088.

The previous prime is 1864117. The next prime is 1864151. The reversal of 1864140 is 414681.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1864140.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15475 + ... + 15594.

It is an arithmetic number, because the mean of its divisors is an integer number (217490).

2^1864140 is an apocalyptic number.

1864140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1864140 is an abundant number, since it is smaller than the sum of its proper divisors (3355620).

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

1864140 is a wasteful number, since it uses less digits than its factorization.

1864140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31081 (or 31079 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1864140 is about 1365.3351236967. The cubic root of 1864140 is about 123.0720709225.

It can be divided in two parts, 18641 and 40, that added together give a palindrome (18681).

The spelling of 1864140 in words is "one million, eight hundred sixty-four thousand, one hundred forty".