145723778 has 8 divisors (see below), whose sum is σ = 218652672. Its totient is φ = 72839556.

The previous prime is 145723763. The next prime is 145723817. The reversal of 145723778 is 877327541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250 + ... + 17117.

It is an arithmetic number, because the mean of its divisors is an integer number (27331584).

Almost surely, 2^145723778 is an apocalyptic number.

145723778 is a deficient number, since it is larger than the sum of its proper divisors (72928894).

145723778 is a wasteful number, since it uses less digits than its factorization.

145723778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22336.

The product of its digits is 329280, while the sum is 44.

The square root of 145723778 is about 12071.6104145222. The cubic root of 145723778 is about 526.2314589977.

The spelling of 145723778 in words is "one hundred forty-five million, seven hundred twenty-three thousand, seven hundred seventy-eight".