154228989 has 8 divisors (see below), whose sum is σ = 212729760. Its totient is φ = 99273776.

The previous prime is 154228939. The next prime is 154229017. The reversal of 154228989 is 989822451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 154228989 - 2¹² = 154224893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154228939) 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, 886287 + ... + 886460.

It is an arithmetic number, because the mean of its divisors is an integer number (26591220).

Almost surely, 2^154228989 is an apocalyptic number.

It is an amenable number.

154228989 is a deficient number, since it is larger than the sum of its proper divisors (58500771).

154228989 is a wasteful number, since it uses less digits than its factorization.

154228989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772779.

The product of its digits is 414720, while the sum is 48.

The square root of 154228989 is about 12418.8964485577. The cubic root of 154228989 is about 536.2763817906.

The spelling of 154228989 in words is "one hundred fifty-four million, two hundred twenty-eight thousand, nine hundred eighty-nine".