722005405 has 16 divisors (see below), whose sum is σ = 958123584. Its totient is φ = 517898880.

The previous prime is 722005391. The next prime is 722005409. The reversal of 722005405 is 504500227.

It is not a de Polignac number, because 722005405 - 2²¹ = 719908253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 722005405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722005409) 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, 85899 + ... + 93928.

It is an arithmetic number, because the mean of its divisors is an integer number (59882724).

Almost surely, 2^722005405 is an apocalyptic number.

It is an amenable number.

722005405 is a deficient number, since it is larger than the sum of its proper divisors (236118179).

722005405 is a wasteful number, since it uses less digits than its factorization.

722005405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179916.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 722005405 is about 26870.1582615362. The cubic root of 722005405 is about 897.1123104743.

The spelling of 722005405 in words is "seven hundred twenty-two million, five thousand, four hundred five".