145838306 has 4 divisors (see below), whose sum is σ = 218757462. Its totient is φ = 72919152.

The previous prime is 145838299. The next prime is 145838309. The reversal of 145838306 is 603838541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 603838541 = 523 ⋅1154567.

It can be written as a sum of positive squares in only one way, i.e., 134676025 + 11162281 = 11605^2 + 3341^2 .

It is a super-2 number, since 2×145838306² = 42537622993899272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145838306.

It is not an unprimeable number, because it can be changed into a prime (145838309) by changing a digit.

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, 36459575 + ... + 36459578.

Almost surely, 2^145838306 is an apocalyptic number.

145838306 is a deficient number, since it is larger than the sum of its proper divisors (72919156).

145838306 is an equidigital number, since it uses as much as digits as its factorization.

145838306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72919155.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 145838306 is about 12076.3531746964. The cubic root of 145838306 is about 526.3692824321.

The spelling of 145838306 in words is "one hundred forty-five million, eight hundred thirty-eight thousand, three hundred six".