145646540 has 24 divisors (see below), whose sum is σ = 329385840. Its totient is φ = 53777088.

The previous prime is 145646513. The next prime is 145646549. The reversal of 145646540 is 45646541.

145646540 = 248² + 249² + ... + 767².

145646540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×145646540² = 42425829227943200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145646540.

It is not an unprimeable number, because it can be changed into a prime (145646549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279830 + ... + 280349.

It is an arithmetic number, because the mean of its divisors is an integer number (13724410).

Almost surely, 2^145646540 is an apocalyptic number.

145646540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145646540 is an abundant number, since it is smaller than the sum of its proper divisors (183739300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145646540 is a wasteful number, since it uses less digits than its factorization.

145646540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560201 (or 560199 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 145646540 is about 12068.4108315884. The cubic root of 145646540 is about 526.1384697155.

Subtracting from 145646540 its reverse (45646541), we obtain a palindrome (99999999).

The spelling of 145646540 in words is "one hundred forty-five million, six hundred forty-six thousand, five hundred forty".