406551946 has 8 divisors (see below), whose sum is σ = 619825284. Its totient is φ = 199943520.

The previous prime is 406551919. The next prime is 406551973. The reversal of 406551946 is 649155604.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (406551919) and next prime (406551973).

It can be written as a sum of positive squares in 2 ways, for example, as 278522721 + 128029225 = 16689^2 + 11315^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 406551899 and 406551908.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1666075 + ... + 1666318.

Almost surely, 2^406551946 is an apocalyptic number.

406551946 is a deficient number, since it is larger than the sum of its proper divisors (213273338).

406551946 is a wasteful number, since it uses less digits than its factorization.

406551946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332456.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 406551946 is about 20163.1333378520. The cubic root of 406551946 is about 740.8074616789.

The spelling of 406551946 in words is "four hundred six million, five hundred fifty-one thousand, nine hundred forty-six".