145911780 has 144 divisors (see below), whose sum is σ = 524684160. Its totient is φ = 33343488.

The previous prime is 145911769. The next prime is 145911791. The reversal of 145911780 is 87119541.

It is an interprime number because it is at equal distance from previous prime (145911769) and next prime (145911791).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31876 + ... + 36164.

It is an arithmetic number, because the mean of its divisors is an integer number (3643640).

Almost surely, 2^145911780 is an apocalyptic number.

145911780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145911780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262342080).

145911780 is an abundant number, since it is smaller than the sum of its proper divisors (378772380).

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

145911780 is a wasteful number, since it uses less digits than its factorization.

145911780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320 (or 4306 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 145911780 is about 12079.3948523922. The cubic root of 145911780 is about 526.4576633355.

It can be divided in two parts, 145 and 911780, that added together give a triangular number (911925 = T₁₃₅₀).

The spelling of 145911780 in words is "one hundred forty-five million, nine hundred eleven thousand, seven hundred eighty".