149290978 has 16 divisors (see below), whose sum is σ = 233291520. Its totient is φ = 71571600.

The previous prime is 149290951. The next prime is 149290979. The reversal of 149290978 is 879092941.

It is a super-2 number, since 2×149290978² = 44575592224392968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149290979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4288 + ... + 17803.

It is an arithmetic number, because the mean of its divisors is an integer number (14580720).

Almost surely, 2^149290978 is an apocalyptic number.

149290978 is a deficient number, since it is larger than the sum of its proper divisors (84000542).

149290978 is a wasteful number, since it uses less digits than its factorization.

149290978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22233.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 149290978 is about 12218.4687256628. The cubic root of 149290978 is about 530.4907972937.

The spelling of 149290978 in words is "one hundred forty-nine million, two hundred ninety thousand, nine hundred seventy-eight".