1045172398 has 12 divisors (see below), whose sum is σ = 1590425928. Its totient is φ = 515035920.

The previous prime is 1045172377. The next prime is 1045172399. The reversal of 1045172398 is 8932715401.

It is a self number, because there is not a number n which added to its sum of digits gives 1045172398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045172399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 383890 + ... + 386602.

It is an arithmetic number, because the mean of its divisors is an integer number (132535494).

Almost surely, 2^1045172398 is an apocalyptic number.

1045172398 is a deficient number, since it is larger than the sum of its proper divisors (545253530).

1045172398 is an frugal number, since it uses more digits than its factorization.

1045172398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5499 (or 2786 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 1045172398 is about 32329.1261558366. The cubic root of 1045172398 is about 1014.8362627479.

Adding to 1045172398 its reverse (8932715401), we get a palindrome (9977887799).

The spelling of 1045172398 in words is "one billion, forty-five million, one hundred seventy-two thousand, three hundred ninety-eight".