249977644 has 24 divisors (see below), whose sum is σ = 500290560. Its totient is φ = 107061456.

The previous prime is 249977569. The next prime is 249977669. The reversal of 249977644 is 446779942.

It is a junction number, because it is equal to n+sod(n) for n = 249977591 and 249977600.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77349 + ... + 80515.

It is an arithmetic number, because the mean of its divisors is an integer number (20845440).

Almost surely, 2^249977644 is an apocalyptic number.

It is an amenable number.

249977644 is an abundant number, since it is smaller than the sum of its proper divisors (250312916).

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

249977644 is a wasteful number, since it uses less digits than its factorization.

249977644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5997 (or 5995 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 52.

The square root of 249977644 is about 15810.6813262427. The cubic root of 249977644 is about 629.9417465244.

The spelling of 249977644 in words is "two hundred forty-nine million, nine hundred seventy-seven thousand, six hundred forty-four".