154239864 has 64 divisors (see below), whose sum is σ = 401587200. Its totient is φ = 49305984.

The previous prime is 154239859. The next prime is 154239871. The reversal of 154239864 is 468932451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115569 + ... + 116895.

It is an arithmetic number, because the mean of its divisors is an integer number (6274800).

Almost surely, 2^154239864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154239864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200793600).

154239864 is an abundant number, since it is smaller than the sum of its proper divisors (247347336).

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

154239864 is a wasteful number, since it uses less digits than its factorization.

154239864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532 (or 1528 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 154239864 is about 12419.3342816755. The cubic root of 154239864 is about 536.2889861409.

The spelling of 154239864 in words is "one hundred fifty-four million, two hundred thirty-nine thousand, eight hundred sixty-four".