145055398 has 4 divisors (see below), whose sum is σ = 217583100. Its totient is φ = 72527698.

The previous prime is 145055389. The next prime is 145055399. The reversal of 145055398 is 893550541.

145055398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 145055398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145055399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36263848 + ... + 36263851.

It is an arithmetic number, because the mean of its divisors is an integer number (54395775).

Almost surely, 2^145055398 is an apocalyptic number.

145055398 is a deficient number, since it is larger than the sum of its proper divisors (72527702).

145055398 is an equidigital number, since it uses as much as digits as its factorization.

145055398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72527701.

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 145055398 is about 12043.8946358726. The cubic root of 145055398 is about 525.4256840779.

The spelling of 145055398 in words is "one hundred forty-five million, fifty-five thousand, three hundred ninety-eight".