249810040 has 16 divisors (see below), whose sum is σ = 562072680. Its totient is φ = 99924000.

The previous prime is 249810037. The next prime is 249810049. The reversal of 249810040 is 40018942.

It is a junction number, because it is equal to n+sod(n) for n = 249809990 and 249810008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249810049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3122586 + ... + 3122665.

Almost surely, 2^249810040 is an apocalyptic number.

249810040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249810040 is an abundant number, since it is smaller than the sum of its proper divisors (312262640).

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

249810040 is a wasteful number, since it uses less digits than its factorization.

249810040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6245262 (or 6245258 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 249810040 is about 15805.3800966633. The cubic root of 249810040 is about 629.8009281162.

Adding to 249810040 its reverse (40018942), we get a palindrome (289828982).

The spelling of 249810040 in words is "two hundred forty-nine million, eight hundred ten thousand, forty".