145403398 has 16 divisors (see below), whose sum is σ = 249714720. Its totient is φ = 62202816.

The previous prime is 145403389. The next prime is 145403411. The reversal of 145403398 is 893304541.

It is a super-2 number, since 2×145403398² = 42284296299892808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1161 + ... + 17092.

It is an arithmetic number, because the mean of its divisors is an integer number (15607170).

Almost surely, 2^145403398 is an apocalyptic number.

145403398 is a deficient number, since it is larger than the sum of its proper divisors (104311322).

145403398 is a wasteful number, since it uses less digits than its factorization.

145403398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18831.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 145403398 is about 12058.3331352223. Note that the first 3 decimals coincide. The cubic root of 145403398 is about 525.8455285247.

The spelling of 145403398 in words is "one hundred forty-five million, four hundred three thousand, three hundred ninety-eight".