145331880 has 128 divisors (see below), whose sum is σ = 452390400. Its totient is φ = 37324800.

The previous prime is 145331863. The next prime is 145331881. The reversal of 145331880 is 88133541.

It is a super-2 number, since 2×145331880² = 42242710688668800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145331881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 536145 + ... + 536415.

It is an arithmetic number, because the mean of its divisors is an integer number (3534300).

Almost surely, 2^145331880 is an apocalyptic number.

145331880 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 145331880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226195200).

145331880 is an abundant number, since it is smaller than the sum of its proper divisors (307058520).

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

145331880 is a wasteful number, since it uses less digits than its factorization.

145331880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 145331880 is about 12055.3672693950. The cubic root of 145331880 is about 525.7593003977.

It can be divided in two parts, 1453 and 31880, that added together give a palindrome (33333).

The spelling of 145331880 in words is "one hundred forty-five million, three hundred thirty-one thousand, eight hundred eighty".