145799720 has 64 divisors (see below), whose sum is σ = 359683200. Its totient is φ = 52750080.

The previous prime is 145799681. The next prime is 145799723. The reversal of 145799720 is 27997541.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (145799723) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 100037 + ... + 101483.

It is an arithmetic number, because the mean of its divisors is an integer number (5620050).

Almost surely, 2^145799720 is an apocalyptic number.

145799720 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 145799720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179841600).

145799720 is an abundant number, since it is smaller than the sum of its proper divisors (213883480).

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

145799720 is a wasteful number, since it uses less digits than its factorization.

145799720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698 (or 1694 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 145799720 is about 12074.7554840667. The cubic root of 145799720 is about 526.3228559542.

The spelling of 145799720 in words is "one hundred forty-five million, seven hundred ninety-nine thousand, seven hundred twenty".