145903448 has 32 divisors (see below), whose sum is σ = 277020000. Its totient is φ = 72038400.

The previous prime is 145903447. The next prime is 145903481. The reversal of 145903448 is 844309541.

It is a super-2 number, since 2×145903448² = 42575632276577408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145903447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324728 + ... + 325176.

It is an arithmetic number, because the mean of its divisors is an integer number (8656875).

Almost surely, 2^145903448 is an apocalyptic number.

It is an amenable number.

145903448 is a deficient number, since it is larger than the sum of its proper divisors (131116552).

145903448 is a wasteful number, since it uses less digits than its factorization.

145903448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 145903448 is about 12079.0499626419. The cubic root of 145903448 is about 526.4476423745.

The spelling of 145903448 in words is "one hundred forty-five million, nine hundred three thousand, four hundred forty-eight".