391226735048 has 108 divisors (see below), whose sum is σ = 788759033985. Its totient is φ = 181894664448.

The previous prime is 391226735027. The next prime is 391226735057. The reversal of 391226735048 is 840537622193.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 247086538084 + 144140196964 = 497078^2 + 379658^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=442282.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 391226734987 and 391226735005.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3462183440 + ... + 3462183552.

It is a 1-persistent number, because it is pandigital, but 2⋅391226735048 = 782453470096 is not.

Almost surely, 2^391226735048 is an apocalyptic number.

391226735048 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

391226735048 is an abundant number, since it is smaller than the sum of its proper divisors (397532298937).

391226735048 is a wasteful number, since it uses less digits than its factorization.

391226735048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 50.

Multiplying 391226735048 by its sum of digits (50), we get a square (19561336752400 = 4422820²).

The spelling of 391226735048 in words is "three hundred ninety-one billion, two hundred twenty-six million, seven hundred thirty-five thousand, forty-eight".