145320740 has 48 divisors (see below), whose sum is σ = 332337600. Its totient is φ = 53165952.

The previous prime is 145320731. The next prime is 145320751. The reversal of 145320740 is 47023541.

It is a super-2 number, since 2×145320740² = 42236234948295200, which contains 22 as substring.

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, 4427 + ... + 17613.

It is an arithmetic number, because the mean of its divisors is an integer number (6923700).

Almost surely, 2^145320740 is an apocalyptic number.

145320740 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 145320740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166168800).

145320740 is an abundant number, since it is smaller than the sum of its proper divisors (187016860).

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

145320740 is a wasteful number, since it uses less digits than its factorization.

145320740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13244 (or 13242 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 145320740 is about 12054.9052256747. The cubic root of 145320740 is about 525.7458665288.

The spelling of 145320740 in words is "one hundred forty-five million, three hundred twenty thousand, seven hundred forty".