145138736 has 20 divisors (see below), whose sum is σ = 290904000. Its totient is φ = 70066752.

The previous prime is 145138733. The next prime is 145138757. The reversal of 145138736 is 637831541.

It is a self number, because there is not a number n which added to its sum of digits gives 145138736.

It is not an unprimeable number, because it can be changed into a prime (145138733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155936 + ... + 156863.

It is an arithmetic number, because the mean of its divisors is an integer number (14545200).

Almost surely, 2^145138736 is an apocalyptic number.

145138736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

145138736 is an abundant number, since it is smaller than the sum of its proper divisors (145765264).

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

145138736 is a wasteful number, since it uses less digits than its factorization.

145138736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312836 (or 312830 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 145138736 is about 12047.3539003384. The cubic root of 145138736 is about 525.5262882682.

The spelling of 145138736 in words is "one hundred forty-five million, one hundred thirty-eight thousand, seven hundred thirty-six".