402311412 has 18 divisors (see below), whose sum is σ = 1016953938. Its totient is φ = 134103792.

The previous prime is 402311411. The next prime is 402311447. The reversal of 402311412 is 214113204.

It can be written as a sum of positive squares in only one way, i.e., 395373456 + 6937956 = 19884^2 + 2634^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402311411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5587623 + ... + 5587694.

It is an arithmetic number, because the mean of its divisors is an integer number (56497441).

Almost surely, 2^402311412 is an apocalyptic number.

It is an amenable number.

402311412 is an abundant number, since it is smaller than the sum of its proper divisors (614642526).

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

402311412 is a wasteful number, since it uses less digits than its factorization.

402311412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11175327 (or 11175322 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 402311412 is about 20057.7020618016. The cubic root of 402311412 is about 738.2227939060. Note that the first 3 decimals are identical.

Adding to 402311412 its reverse (214113204), we get a palindrome (616424616).

The spelling of 402311412 in words is "four hundred two million, three hundred eleven thousand, four hundred twelve".