149778 has 24 divisors (see below), whose sum is σ = 332748. Its totient is φ = 48672.

The previous prime is 149771. The next prime is 149791. The reversal of 149778 is 877941.

149778 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in 2 ways, for example, as 149769 + 9 = 387^2 + 3^2 .

It is a nialpdrome in base 8.

It is a zygodrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 149778.

It is not an unprimeable number, because it can be changed into a prime (149771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 876 + ... + 1032.

2¹⁴⁹⁷⁷⁸ is an apocalyptic number.

149778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

149778 is an abundant number, since it is smaller than the sum of its proper divisors (182970).

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

149778 is a wasteful number, since it uses less digits than its factorization.

149778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 215 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 149778 is about 387.0116277323. The cubic root of 149778 is about 53.1067032724.

The spelling of 149778 in words is "one hundred forty-nine thousand, seven hundred seventy-eight".