249689340 has 36 divisors (see below), whose sum is σ = 757391544. Its totient is φ = 66583776.

The previous prime is 249689339. The next prime is 249689351. The reversal of 249689340 is 43986942.

249689340 is a `hidden beast` number, since 249 + 68 + 9 + 340 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 693402 + ... + 693761.

It is an arithmetic number, because the mean of its divisors is an integer number (21038654).

Almost surely, 2^249689340 is an apocalyptic number.

249689340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249689340 is an abundant number, since it is smaller than the sum of its proper divisors (507702204).

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

249689340 is a wasteful number, since it uses less digits than its factorization.

249689340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387178 (or 1387173 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 249689340 is about 15801.5613152625. The cubic root of 249689340 is about 629.6994787398.

The spelling of 249689340 in words is "two hundred forty-nine million, six hundred eighty-nine thousand, three hundred forty".