45398 has 4 divisors (see below), whose sum is σ = 68100. Its totient is φ = 22698.

The previous prime is 45389. The next prime is 45403. The reversal of 45398 is 89354.

45398 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 plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 45398.

It is a congruent number.

It is an unprimeable number.

45398 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11348 + ... + 11351.

It is an arithmetic number, because the mean of its divisors is an integer number (17025).

2⁴⁵³⁹⁸ is an apocalyptic number.

45398 is a deficient number, since it is larger than the sum of its proper divisors (22702).

45398 is a wasteful number, since it uses less digits than its factorization.

45398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22701.

The product of its digits is 4320, while the sum is 29.

The square root of 45398 is about 213.0680642424. The cubic root of 45398 is about 35.6734878890.

Subtracting from 45398 its sum of digits (29), we obtain a square (45369 = 213²).

Subtracting 45398 from its reverse (89354), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 45398 in words is "forty-five thousand, three hundred ninety-eight".