1405723234 has 16 divisors (see below), whose sum is σ = 2284543008. Its totient is φ = 646132032.

The previous prime is 1405723229. The next prime is 1405723273. The reversal of 1405723234 is 4323275041.

It is a happy number.

It is a super-3 number, since 3×1405723234³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1405723196 and 1405723205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479292 + ... + 482215.

It is an arithmetic number, because the mean of its divisors is an integer number (142783938).

Almost surely, 2^1405723234 is an apocalyptic number.

1405723234 is a deficient number, since it is larger than the sum of its proper divisors (878819774).

1405723234 is a wasteful number, since it uses less digits than its factorization.

1405723234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961569.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 1405723234 is about 37492.9757954740. The cubic root of 1405723234 is about 1120.2112787002.

Adding to 1405723234 its reverse (4323275041), we get a palindrome (5728998275).

The spelling of 1405723234 in words is "one billion, four hundred five million, seven hundred twenty-three thousand, two hundred thirty-four".