145194728 has 16 divisors (see below), whose sum is σ = 311131680. Its totient is φ = 62226288.

The previous prime is 145194727. The next prime is 145194799. The reversal of 145194728 is 827491541.

It is not an unprimeable number, because it can be changed into a prime (145194727) 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, 1296326 + ... + 1296437.

It is an arithmetic number, because the mean of its divisors is an integer number (19445730).

Almost surely, 2^145194728 is an apocalyptic number.

It is an amenable number.

145194728 is an abundant number, since it is smaller than the sum of its proper divisors (165936952).

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

145194728 is a wasteful number, since it uses less digits than its factorization.

145194728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592776 (or 2592772 counting only the distinct ones).

The product of its digits is 80640, while the sum is 41.

The square root of 145194728 is about 12049.6775060580. The cubic root of 145194728 is about 525.5938592136.

The spelling of 145194728 in words is "one hundred forty-five million, one hundred ninety-four thousand, seven hundred twenty-eight".