1945920 has 56 divisors (see below), whose sum is σ = 6181344. Its totient is φ = 518656.

The previous prime is 1945919. The next prime is 1945943. The reversal of 1945920 is 295491.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54 + ... + 1973.

2^1945920 is an apocalyptic number.

1945920 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 1945920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3090672).

1945920 is an abundant number, since it is smaller than the sum of its proper divisors (4235424).

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

1945920 is a wasteful number, since it uses less digits than its factorization.

1945920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047 (or 2037 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1945920 is about 1394.9623650837. The cubic root of 1945920 is about 124.8461039391.

The spelling of 1945920 in words is "one million, nine hundred forty-five thousand, nine hundred twenty".