348536721 has 16 divisors (see below), whose sum is σ = 501044544. Its totient is φ = 214234944.

The previous prime is 348536717. The next prime is 348536731. The reversal of 348536721 is 127635843.

It is not a de Polignac number, because 348536721 - 2² = 348536717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 348536721.

It is not an unprimeable number, because it can be changed into a prime (348536731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32215 + ... + 41651.

It is an arithmetic number, because the mean of its divisors is an integer number (31315284).

Almost surely, 2^348536721 is an apocalyptic number.

It is an amenable number.

348536721 is a deficient number, since it is larger than the sum of its proper divisors (152507823).

348536721 is a wasteful number, since it uses less digits than its factorization.

348536721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10400.

The product of its digits is 120960, while the sum is 39.

The square root of 348536721 is about 18669.1381964996. The cubic root of 348536721 is about 703.7463904697.

The spelling of 348536721 in words is "three hundred forty-eight million, five hundred thirty-six thousand, seven hundred twenty-one".