406917642 has 16 divisors (see below), whose sum is σ = 856668960. Its totient is φ = 128500272.

The previous prime is 406917617. The next prime is 406917649. The reversal of 406917642 is 246719604.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 406917642.

It is not an unprimeable number, because it can be changed into a prime (406917649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1784613 + ... + 1784840.

It is an arithmetic number, because the mean of its divisors is an integer number (53541810).

Almost surely, 2^406917642 is an apocalyptic number.

406917642 is an abundant number, since it is smaller than the sum of its proper divisors (449751318).

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

406917642 is a wasteful number, since it uses less digits than its factorization.

406917642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569477.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 406917642 is about 20172.1997313134. The cubic root of 406917642 is about 741.0295154166.

The spelling of 406917642 in words is "four hundred six million, nine hundred seventeen thousand, six hundred forty-two".