249220528440 has 64 divisors (see below), whose sum is σ = 805174020000. Its totient is φ = 61346591232.

The previous prime is 249220528433. The next prime is 249220528463. The reversal of 249220528440 is 44825022942.

249220528440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×249220528440² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 249220528392 and 249220528401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79876815 + ... + 79879934.

Almost surely, 2^249220528440 is an apocalyptic number.

249220528440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249220528440 is an abundant number, since it is smaller than the sum of its proper divisors (555953491560).

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

249220528440 is a wasteful number, since it uses less digits than its factorization.

249220528440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159756776 (or 159756772 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The spelling of 249220528440 in words is "two hundred forty-nine billion, two hundred twenty million, five hundred twenty-eight thousand, four hundred forty".