145332728 has 32 divisors (see below), whose sum is σ = 291794400. Its totient is φ = 67617792.

The previous prime is 145332709. The next prime is 145332749. The reversal of 145332728 is 827233541.

145332728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×145332728² = 42243203655843968, which contains 22 as substring.

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, 6101 + ... + 18107.

It is an arithmetic number, because the mean of its divisors is an integer number (9118575).

Almost surely, 2^145332728 is an apocalyptic number.

It is an amenable number.

145332728 is an abundant number, since it is smaller than the sum of its proper divisors (146461672).

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

145332728 is a wasteful number, since it uses less digits than its factorization.

145332728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12119 (or 12115 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 145332728 is about 12055.4024403999. The cubic root of 145332728 is about 525.7603229836.

The spelling of 145332728 in words is "one hundred forty-five million, three hundred thirty-two thousand, seven hundred twenty-eight".