249923154 has 48 divisors (see below), whose sum is σ = 571874688. Its totient is φ = 72369408.

The previous prime is 249923101. The next prime is 249923159. The reversal of 249923154 is 451329942.

249923154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (249923159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16999 + ... + 28085.

It is an arithmetic number, because the mean of its divisors is an integer number (11914056).

Almost surely, 2^249923154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249923154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285937344).

249923154 is an abundant number, since it is smaller than the sum of its proper divisors (321951534).

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

249923154 is a wasteful number, since it uses less digits than its factorization.

249923154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11139 (or 11122 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 249923154 is about 15808.9580301802. The cubic root of 249923154 is about 629.8959717374.

The spelling of 249923154 in words is "two hundred forty-nine million, nine hundred twenty-three thousand, one hundred fifty-four".