249336478 has 16 divisors (see below), whose sum is σ = 384127920. Its totient is φ = 121336000.

The previous prime is 249336473. The next prime is 249336481. The reversal of 249336478 is 874633942.

It is a super-2 number, since 2×249336478² = 124337358522888968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249336473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1458 + ... + 22378.

It is an arithmetic number, because the mean of its divisors is an integer number (24007995).

Almost surely, 2^249336478 is an apocalyptic number.

249336478 is a deficient number, since it is larger than the sum of its proper divisors (134791442).

249336478 is a wasteful number, since it uses less digits than its factorization.

249336478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21083.

The product of its digits is 870912, while the sum is 46.

The square root of 249336478 is about 15790.3919520701. The cubic root of 249336478 is about 629.4027076006.

The spelling of 249336478 in words is "two hundred forty-nine million, three hundred thirty-six thousand, four hundred seventy-eight".