145530640 has 40 divisors (see below), whose sum is σ = 342656640. Its totient is φ = 57472896.

The previous prime is 145530631. The next prime is 145530641. The reversal of 145530640 is 46035541.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 145530599 and 145530608.

It is not an unprimeable number, because it can be changed into a prime (145530641) 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, 5194 + ... + 17833.

It is an arithmetic number, because the mean of its divisors is an integer number (8566416).

Almost surely, 2^145530640 is an apocalyptic number.

145530640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145530640 is an abundant number, since it is smaller than the sum of its proper divisors (197126000).

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

145530640 is a wasteful number, since it uses less digits than its factorization.

145530640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23119 (or 23113 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 145530640 is about 12063.6080838197. The cubic root of 145530640 is about 525.9988723248.

The spelling of 145530640 in words is "one hundred forty-five million, five hundred thirty thousand, six hundred forty".