149187780 has 144 divisors (see below), whose sum is σ = 521015040. Its totient is φ = 33848064.

The previous prime is 149187751. The next prime is 149187799. The reversal of 149187780 is 87781941.

149187780 is a `hidden beast` number, since 1 + 491 + 87 + 7 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 210066 + ... + 210774.

It is an arithmetic number, because the mean of its divisors is an integer number (3618160).

Almost surely, 2^149187780 is an apocalyptic number.

149187780 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 149187780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260507520).

149187780 is an abundant number, since it is smaller than the sum of its proper divisors (371827260).

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

149187780 is a wasteful number, since it uses less digits than its factorization.

149187780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898 (or 893 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The square root of 149187780 is about 12214.2449623380. The cubic root of 149187780 is about 530.3685344724.

The spelling of 149187780 in words is "one hundred forty-nine million, one hundred eighty-seven thousand, seven hundred eighty".