149790978 has 32 divisors (see below), whose sum is σ = 352451520. Its totient is φ = 46992960.

The previous prime is 149790913. The next prime is 149791007. The reversal of 149790978 is 879097941.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80668 + ... + 82503.

It is an arithmetic number, because the mean of its divisors is an integer number (11014110).

Almost surely, 2^149790978 is an apocalyptic number.

149790978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

149790978 is an abundant number, since it is smaller than the sum of its proper divisors (202660542).

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

149790978 is a wasteful number, since it uses less digits than its factorization.

149790978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163199 (or 163193 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 149790978 is about 12238.9124516846. The cubic root of 149790978 is about 531.0823709555.

The spelling of 149790978 in words is "one hundred forty-nine million, seven hundred ninety thousand, nine hundred seventy-eight".