149742978 has 32 divisors (see below), whose sum is σ = 373386240. Its totient is φ = 38894160.

The previous prime is 149742977. The next prime is 149743019. The reversal of 149742978 is 879247941.

It is a self number, because there is not a number n which added to its sum of digits gives 149742978.

It is not an unprimeable number, because it can be changed into a prime (149742977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161598 + ... + 162521.

It is an arithmetic number, because the mean of its divisors is an integer number (11668320).

Almost surely, 2^149742978 is an apocalyptic number.

149742978 is an abundant number, since it is smaller than the sum of its proper divisors (223643262).

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

149742978 is a wasteful number, since it uses less digits than its factorization.

149742978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324142.

The product of its digits is 1016064, while the sum is 51.

The square root of 149742978 is about 12236.9513360150. The cubic root of 149742978 is about 531.0256370597.

The spelling of 149742978 in words is "one hundred forty-nine million, seven hundred forty-two thousand, nine hundred seventy-eight".