249678936 has 160 divisors (see below), whose sum is σ = 762909840. Its totient is φ = 75831552.

The previous prime is 249678931. The next prime is 249678959. The reversal of 249678936 is 639876942.

It is a happy number.

249678936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×249678936³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249678931) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 901230 + ... + 901506.

Almost surely, 2^249678936 is an apocalyptic number.

249678936 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249678936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381454920).

249678936 is an abundant number, since it is smaller than the sum of its proper divisors (513230904).

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

249678936 is a wasteful number, since it uses less digits than its factorization.

249678936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 402 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 249678936 is about 15801.2321038582. The cubic root of 249678936 is about 629.6907325590.

The spelling of 249678936 in words is "two hundred forty-nine million, six hundred seventy-eight thousand, nine hundred thirty-six".