154421398 has 8 divisors (see below), whose sum is σ = 243823320. Its totient is φ = 73146960.

The previous prime is 154421389. The next prime is 154421401. The reversal of 154421398 is 893124451.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2031823 + ... + 2031898.

It is an arithmetic number, because the mean of its divisors is an integer number (30477915).

Almost surely, 2^154421398 is an apocalyptic number.

154421398 is a deficient number, since it is larger than the sum of its proper divisors (89401922).

154421398 is a wasteful number, since it uses less digits than its factorization.

154421398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063742.

The product of its digits is 34560, while the sum is 37.

The square root of 154421398 is about 12426.6406562675. The cubic root of 154421398 is about 536.4993003728.

The spelling of 154421398 in words is "one hundred fifty-four million, four hundred twenty-one thousand, three hundred ninety-eight".