309111357040 has 40 divisors (see below), whose sum is σ = 719265124800. Its totient is φ = 123544548096.

The previous prime is 309111357013. The next prime is 309111357053. The reversal of 309111357040 is 40753111903.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×309111357040² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 309111356987 and 309111357005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1462840 + ... + 1660759.

It is an arithmetic number, because the mean of its divisors is an integer number (17981628120).

Almost surely, 2^309111357040 is an apocalyptic number.

It is an amenable number.

309111357040 is an abundant number, since it is smaller than the sum of its proper divisors (410153767760).

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

309111357040 is a wasteful number, since it uses less digits than its factorization.

309111357040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124849 (or 3124843 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 34.

Adding to 309111357040 its reverse (40753111903), we get a palindrome (349864468943).

The spelling of 309111357040 in words is "three hundred nine billion, one hundred eleven million, three hundred fifty-seven thousand, forty".