1925640 has 64 divisors (see below), whose sum is σ = 6422400. Its totient is φ = 513216.

The previous prime is 1925639. The next prime is 1925653. The reversal of 1925640 is 465291.

1925640 is a `hidden beast` number, since 19 + 2 + 5 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 189 + ... + 1971.

It is an arithmetic number, because the mean of its divisors is an integer number (100350).

2^1925640 is an apocalyptic number.

1925640 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 1925640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3211200).

1925640 is an abundant number, since it is smaller than the sum of its proper divisors (4496760).

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

1925640 is a wasteful number, since it uses less digits than its factorization.

1925640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803 (or 1793 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1925640 is about 1387.6743133747. The cubic root of 1925640 is about 124.4108812075.

It can be divided in two parts, 192 and 5640, that added together give a cube (5832 = 18³).

The spelling of 1925640 in words is "one million, nine hundred twenty-five thousand, six hundred forty".