145138332 has 24 divisors (see below), whose sum is σ = 338851072. Its totient is φ = 48351600.

The previous prime is 145138307. The next prime is 145138351. The reversal of 145138332 is 233831541.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 145138332.

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, 38157 + ... + 41787.

Almost surely, 2^145138332 is an apocalyptic number.

145138332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145138332 is an abundant number, since it is smaller than the sum of its proper divisors (193712740).

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

145138332 is a wasteful number, since it uses less digits than its factorization.

145138332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6969 (or 6967 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 145138332 is about 12047.3371331593. The cubic root of 145138332 is about 525.5258006593.

Adding to 145138332 its reverse (233831541), we get a palindrome (378969873).

The spelling of 145138332 in words is "one hundred forty-five million, one hundred thirty-eight thousand, three hundred thirty-two".