406247028 has 96 divisors (see below), whose sum is σ = 1100615040. Its totient is φ = 115261440.

The previous prime is 406247003. The next prime is 406247029. The reversal of 406247028 is 820742604.

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

It is a self number, because there is not a number n which added to its sum of digits gives 406247028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406247029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 603300 + ... + 603972.

It is an arithmetic number, because the mean of its divisors is an integer number (11464740).

Almost surely, 2^406247028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 406247028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (550307520).

406247028 is an abundant number, since it is smaller than the sum of its proper divisors (694368012).

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

406247028 is a wasteful number, since it uses less digits than its factorization.

406247028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 406247028 is about 20155.5706443653. The cubic root of 406247028 is about 740.6222110383.

The spelling of 406247028 in words is "four hundred six million, two hundred forty-seven thousand, twenty-eight".