1915140 has 48 divisors (see below), whose sum is σ = 5463360. Its totient is φ = 501120.

The previous prime is 1915117. The next prime is 1915153. The reversal of 1915140 is 415191.

It is a super-2 number, since 2×1915140² = 7335522439200, which contains 22 as substring.

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, 3270 + ... + 3810.

It is an arithmetic number, because the mean of its divisors is an integer number (113820).

2^1915140 is an apocalyptic number.

1915140 is a gapful number since it is divisible by the number (10) 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 1915140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2731680).

1915140 is an abundant number, since it is smaller than the sum of its proper divisors (3548220).

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

1915140 is a wasteful number, since it uses less digits than its factorization.

1915140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1915140 is about 1383.8858334415. The cubic root of 1915140 is about 124.1843425331.

It can be divided in two parts, 19151 and 40, that added together give a palindrome (19191).

The spelling of 1915140 in words is "one million, nine hundred fifteen thousand, one hundred forty".