149775780 has 192 divisors, whose sum is σ = 553900032. Its totient is φ = 29276160.

The previous prime is 149775767. The next prime is 149775781. The reversal of 149775780 is 87577941.

149775780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (149775781) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77587 + ... + 79493.

It is an arithmetic number, because the mean of its divisors is an integer number (2884896).

Almost surely, 2^149775780 is an apocalyptic number.

149775780 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 149775780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276950016).

149775780 is an abundant number, since it is smaller than the sum of its proper divisors (404124252).

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

149775780 is a wasteful number, since it uses less digits than its factorization.

149775780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954 (or 1952 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 48.

The square root of 149775780 is about 12238.2915474342. The cubic root of 149775780 is about 531.0644088972.

It can be divided in two parts, 1497 and 75780, that added together give a palindrome (77277).

The spelling of 149775780 in words is "one hundred forty-nine million, seven hundred seventy-five thousand, seven hundred eighty".