154216990 has 32 divisors (see below), whose sum is σ = 285786144. Its totient is φ = 59880960.

The previous prime is 154216987. The next prime is 154216991. The reversal of 154216990 is 99612451.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154216991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92242 + ... + 93898.

It is an arithmetic number, because the mean of its divisors is an integer number (8930817).

Almost surely, 2^154216990 is an apocalyptic number.

154216990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

154216990 is a deficient number, since it is larger than the sum of its proper divisors (131569154).

154216990 is a wasteful number, since it uses less digits than its factorization.

154216990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 154216990 is about 12418.4133447071. The cubic root of 154216990 is about 536.2624740136.

The spelling of 154216990 in words is "one hundred fifty-four million, two hundred sixteen thousand, nine hundred ninety".