145865040 has 80 divisors (see below), whose sum is σ = 455328000. Its totient is φ = 38626816.

The previous prime is 145865039. The next prime is 145865059. The reversal of 145865040 is 40568541.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 145864992 and 145865010.

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, 33721 + ... + 37799.

It is an arithmetic number, because the mean of its divisors is an integer number (5691600).

Almost surely, 2^145865040 is an apocalyptic number.

145865040 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 145865040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227664000).

145865040 is an abundant number, since it is smaller than the sum of its proper divisors (309462960).

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

145865040 is a wasteful number, since it uses less digits than its factorization.

145865040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4244 (or 4238 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 145865040 is about 12077.4599978638. The cubic root of 145865040 is about 526.4014438420.

The spelling of 145865040 in words is "one hundred forty-five million, eight hundred sixty-five thousand, forty".