145508438 has 4 divisors (see below), whose sum is σ = 218262660. Its totient is φ = 72754218.

The previous prime is 145508393. The next prime is 145508443. The reversal of 145508438 is 834805541.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 36377108 + ... + 36377111.

It is an arithmetic number, because the mean of its divisors is an integer number (54565665).

Almost surely, 2^145508438 is an apocalyptic number.

145508438 is a deficient number, since it is larger than the sum of its proper divisors (72754222).

145508438 is an equidigital number, since it uses as much as digits as its factorization.

145508438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72754221.

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 145508438 is about 12062.6878430970. The cubic root of 145508438 is about 525.9721223545.

The spelling of 145508438 in words is "one hundred forty-five million, five hundred eight thousand, four hundred thirty-eight".