145309438 has 8 divisors (see below), whose sum is σ = 230785632. Its totient is φ = 68380896.

The previous prime is 145309393. The next prime is 145309457. The reversal of 145309438 is 834903541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×145309438² = 42229665543751688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145309397 and 145309406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2136870 + ... + 2136937.

It is an arithmetic number, because the mean of its divisors is an integer number (28848204).

Almost surely, 2^145309438 is an apocalyptic number.

145309438 is a deficient number, since it is larger than the sum of its proper divisors (85476194).

145309438 is a wasteful number, since it uses less digits than its factorization.

145309438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4273826.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 145309438 is about 12054.4364447286. The cubic root of 145309438 is about 525.7322366004.

The spelling of 145309438 in words is "one hundred forty-five million, three hundred nine thousand, four hundred thirty-eight".