1356431406 has 32 divisors (see below), whose sum is σ = 2974848768. Its totient is φ = 408906240.

The previous prime is 1356431393. The next prime is 1356431407. The reversal of 1356431406 is 6041346531.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356431407) 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, 40506 + ... + 65981.

It is an arithmetic number, because the mean of its divisors is an integer number (92964024).

Almost surely, 2^1356431406 is an apocalyptic number.

1356431406 is an abundant number, since it is smaller than the sum of its proper divisors (1618417362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1356431406 is a wasteful number, since it uses less digits than its factorization.

1356431406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106696.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 1356431406 is about 36829.7625026282. The cubic root of 1356431406 is about 1106.9617441280.

Adding to 1356431406 its reverse (6041346531), we get a palindrome (7397777937).

The spelling of 1356431406 in words is "one billion, three hundred fifty-six million, four hundred thirty-one thousand, four hundred six".