145815732 has 36 divisors (see below), whose sum is σ = 390273156. Its totient is φ = 45745920.

The previous prime is 145815713. The next prime is 145815737. The reversal of 145815732 is 237518541.

145815732 is a `hidden beast` number, since 1 + 4 + 5 + 81 + 573 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 79816356 + 65999376 = 8934^2 + 8124^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145815737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118519 + ... + 119742.

It is an arithmetic number, because the mean of its divisors is an integer number (10840921).

Almost surely, 2^145815732 is an apocalyptic number.

145815732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145815732 is an abundant number, since it is smaller than the sum of its proper divisors (244457424).

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

145815732 is a wasteful number, since it uses less digits than its factorization.

145815732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238288 (or 238283 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 145815732 is about 12075.4185020644. The cubic root of 145815732 is about 526.3421225049.

The spelling of 145815732 in words is "one hundred forty-five million, eight hundred fifteen thousand, seven hundred thirty-two".