154921398 has 8 divisors (see below), whose sum is σ = 309842808. Its totient is φ = 51640464.

The previous prime is 154921379. The next prime is 154921427. The reversal of 154921398 is 893129451.

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

154921398 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12910111 + ... + 12910122.

It is an arithmetic number, because the mean of its divisors is an integer number (38730351).

Almost surely, 2^154921398 is an apocalyptic number.

154921398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

154921398 is a wasteful number, since it uses less digits than its factorization.

154921398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25820238.

The product of its digits is 77760, while the sum is 42.

The square root of 154921398 is about 12446.7424654003. The cubic root of 154921398 is about 537.0777190205.

The spelling of 154921398 in words is "one hundred fifty-four million, nine hundred twenty-one thousand, three hundred ninety-eight".