249380646 has 8 divisors (see below), whose sum is σ = 498761304. Its totient is φ = 83126880.

The previous prime is 249380641. The next prime is 249380653. The reversal of 249380646 is 646083942.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

249380646 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 249380598 and 249380607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249380641) 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, 20781715 + ... + 20781726.

It is an arithmetic number, because the mean of its divisors is an integer number (62345163).

Almost surely, 2^249380646 is an apocalyptic number.

249380646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

249380646 is a wasteful number, since it uses less digits than its factorization.

249380646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41563446.

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 249380646 is about 15791.7904621357. The cubic root of 249380646 is about 629.4398699895.

The spelling of 249380646 in words is "two hundred forty-nine million, three hundred eighty thousand, six hundred forty-six".