145855720 has 16 divisors (see below), whose sum is σ = 328175460. Its totient is φ = 58342272.

The previous prime is 145855681. The next prime is 145855727. The reversal of 145855720 is 27558541.

It can be written as a sum of positive squares in 2 ways, for example, as 134606404 + 11249316 = 11602^2 + 3354^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 145855720.

It is not an unprimeable number, because it can be changed into a prime (145855727) 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, 1823157 + ... + 1823236.

Almost surely, 2^145855720 is an apocalyptic number.

145855720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145855720 is an abundant number, since it is smaller than the sum of its proper divisors (182319740).

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

145855720 is a wasteful number, since it uses less digits than its factorization.

145855720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646404 (or 3646400 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 37.

The square root of 145855720 is about 12077.0741489816. The cubic root of 145855720 is about 526.3902321860.

The spelling of 145855720 in words is "one hundred forty-five million, eight hundred fifty-five thousand, seven hundred twenty".