145452240 has 80 divisors (see below), whose sum is σ = 501009600. Its totient is φ = 38786688.

The previous prime is 145452149. The next prime is 145452247. The reversal of 145452240 is 42254541.

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

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145452247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31510 + ... + 35829.

It is an arithmetic number, because the mean of its divisors is an integer number (6262620).

Almost surely, 2^145452240 is an apocalyptic number.

145452240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145452240 is an abundant number, since it is smaller than the sum of its proper divisors (355557360).

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

145452240 is a wasteful number, since it uses less digits than its factorization.

145452240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67361 (or 67349 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 145452240 is about 12060.3582036356. The cubic root of 145452240 is about 525.9044003083.

The spelling of 145452240 in words is "one hundred forty-five million, four hundred fifty-two thousand, two hundred forty".