440211397 has 4 divisors (see below), whose sum is σ = 440793676. Its totient is φ = 439629120.

The previous prime is 440211349. The next prime is 440211407. The reversal of 440211397 is 793112044.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 192904321 + 247307076 = 13889^2 + 15726^2 .

It is a cyclic number.

It is not a de Polignac number, because 440211397 - 2¹¹ = 440209349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440211347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290004 + ... + 291517.

It is an arithmetic number, because the mean of its divisors is an integer number (110198419).

Almost surely, 2^440211397 is an apocalyptic number.

It is an amenable number.

440211397 is a deficient number, since it is larger than the sum of its proper divisors (582279).

440211397 is an equidigital number, since it uses as much as digits as its factorization.

440211397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582278.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 440211397 is about 20981.2153365814. The cubic root of 440211397 is about 760.7122806411.

The spelling of 440211397 in words is "four hundred forty million, two hundred eleven thousand, three hundred ninety-seven".