145440380 has 24 divisors (see below), whose sum is σ = 305948832. Its totient is φ = 58076352.

The previous prime is 145440371. The next prime is 145440391. The reversal of 145440380 is 83044541.

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, 6329 + ... + 18191.

It is an arithmetic number, because the mean of its divisors is an integer number (12747868).

Almost surely, 2^145440380 is an apocalyptic number.

145440380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145440380 is an abundant number, since it is smaller than the sum of its proper divisors (160508452).

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

145440380 is a wasteful number, since it uses less digits than its factorization.

145440380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12485 (or 12483 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 145440380 is about 12059.8665000903. The cubic root of 145440380 is about 525.8901060498.

The spelling of 145440380 in words is "one hundred forty-five million, four hundred forty thousand, three hundred eighty".