145401644 has 24 divisors (see below), whose sum is σ = 261363648. Its totient is φ = 70744320.

The previous prime is 145401643. The next prime is 145401649. The reversal of 145401644 is 446104541.

It is a super-2 number, since 2×145401644² = 42283276155805472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145401643) 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, 31892 + ... + 36164.

It is an arithmetic number, because the mean of its divisors is an integer number (10890152).

Almost surely, 2^145401644 is an apocalyptic number.

It is an amenable number.

145401644 is a deficient number, since it is larger than the sum of its proper divisors (115962004).

145401644 is a wasteful number, since it uses less digits than its factorization.

145401644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4505 (or 4503 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 145401644 is about 12058.2604052160. The cubic root of 145401644 is about 525.8434140928.

The spelling of 145401644 in words is "one hundred forty-five million, four hundred one thousand, six hundred forty-four".