406401012 has 36 divisors (see below), whose sum is σ = 1062718020. Its totient is φ = 130795392.

The previous prime is 406400999. The next prime is 406401019. The reversal of 406401012 is 210104604.

406401012 is a `hidden beast` number, since 4 + 0 + 640 + 10 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 237036816 + 169364196 = 15396^2 + 13014^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 (406401019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193593 + ... + 195680.

It is an arithmetic number, because the mean of its divisors is an integer number (29519945).

Almost surely, 2^406401012 is an apocalyptic number.

It is an amenable number.

406401012 is an abundant number, since it is smaller than the sum of its proper divisors (656317008).

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

406401012 is a wasteful number, since it uses less digits than its factorization.

406401012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389312 (or 389307 counting only the distinct ones).

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

The square root of 406401012 is about 20159.3901693479. The cubic root of 406401012 is about 740.7157744424.

Adding to 406401012 its reverse (210104604), we get a palindrome (616505616).

The spelling of 406401012 in words is "four hundred six million, four hundred one thousand, twelve".