145709680 has 20 divisors (see below), whose sum is σ = 338775192. Its totient is φ = 58283840.

The previous prime is 145709677. The next prime is 145709687. The reversal of 145709680 is 86907541.

145709680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145709687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 910606 + ... + 910765.

Almost surely, 2^145709680 is an apocalyptic number.

145709680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145709680 is an abundant number, since it is smaller than the sum of its proper divisors (193065512).

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

145709680 is a wasteful number, since it uses less digits than its factorization.

145709680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821384 (or 1821378 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 145709680 is about 12071.0264683663. The cubic root of 145709680 is about 526.2144884194.

The spelling of 145709680 in words is "one hundred forty-five million, seven hundred nine thousand, six hundred eighty".